Service-Manual-Mitsubishi-Engines-6G72

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SECTIONAL VIEW - SOHC ENGINE for MONTERO AND TRUCK. TSB Revision ... Cooling system. Water-cooled forced ..... Air bleed wire. Camshaft oil.
ENGINE 6672 CONTENTS BRACKET ................................................................ 122 CAMSHAFT, ROCKER ARMS AND BEARING CAPS .................................................... 87 CRANKSHAFT, FLYWHEEL AND DRIVE PLATE ........... . ............................................ 115 CYLINDER HEAD AND VALVES - SOHC ........ 91 CYLINDER HEAD AND VALVES - DOHC ........ 98 EXHAUST MANIFOLD ........................................ 67 2 GENERAL INFORMATION ... ............................. GENERAL SPECIFICATIONS ............................ 12 GENERATOR AND DRIVE BELT ........................ 27 IGNITION SYSTEM ........................... . ................ 44 INTAKE MANIFOLD AND FUEL PARTS ........ 62

INTAKE MANIFOLD PLENUM AND THROTTLE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OIL PAN AND OIL PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PISTON AND CONNECTING ROD . . . . . . . . . . . . . . . . . . . . ROCKER ARMS AND CAMSHAFTS . . . . . . . . . . . . . . . . SEALANT . . . . .. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . THROTTLE BODY . . .. . . . . . . . . . . . . . . . . . . . . . . ...*..... . . . . . . . . . . . . .

32 102

108 77 23 14 24 37 TIMING BELT - SOHC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 TIMING BELT- DOHC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 TURBOCHARGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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6G7 ENGINE - General Information

GENERAL INFORMATION SECTIONAL VIEW - SOHC ENGINE for DIAMANTE

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6G7 ENGINE - General Information

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6G7 ENGINE - General Information

SECTIONAL VIEW - SOHC ENGINE for MONTERO AND TRUCK

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667 ENGINE - General Information

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6G7 ENGINE - General Information

SECTIONAL VIEW - DOHC NON-TURBO ENGINE

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6G7 ENGINE - General Information

SECTIONAL VIEW - DOHC TURBO ENGINE

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667 ENGINE - General Information

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6G7 ENGINE - General Information

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JJBRICATION SYSTEM - SOHC

/

Oil pressure switch \

n

t

Oil pressure gauge unit

Oil cooler by-pass valve - MONTERO only

Rocke

Lash adjuster

7LUOO34

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667 ENGINE - General Information

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UBRICATION SYSTEM - DOHC

Oil pressure switch \

To turbocharger -turbo only

Oil pressure gauge unit

To oil cooler Turbo only

Oil cooler by-pass valve -Turbo only

II

Relief valve

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6G7 ENGINE - General Specifications

GENERAL SPECIFICATIONS SOHC Description

Specifications

Type Number of cylinders Combustion chamber Total displacement cm3 (cu.in.1 Cylinder bore x stroke mm (in.) Compression ratio Front wheel drive vehicle Rear wheel drive vehicle Valve timing: Front wheel drive Intake valve Opens Closes Exhaust valve Opens Closes Valve timing: Rear wheel drive Intake valve Opens Closes Exhaust valve Opens Closes Lubrication system 3il pump type Cooling system JVater pump type EG R type njector type and number njector identification mark For MONTERO and TRUCK For DIAMANTE and TRUCK mm (in.) Throttle bore rhrottle position sensor Iosed throttle position switch

6O”V, SOHC (per bank) 6 Compact type 2,972 (181.4) 91 .I x 76.0 (3.59 x 2.99)

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10.0 8.9

16” BTDC 66” ABDC 56” BBDC 26” ATDC

19” BTDC 59” ABDC 59” BBDC 19” ATDC Pressure feed, full-flow filtration Trochoid type Water-cooled forced circulation Centrifugal impeller type Single type Electromagnetic, 6 B210H N21 OH 60 (2.362) Variable resistor type Movable contact type

667 ENGINE - General Specifications DOHC Description

Specifications

Type Number of cylinders Combustion chamber Total displacement cm3 (cu.in.1 Cylinder bore x stroke mm (in.) Compression ratio Non-turbo Turbo Valve timing-Non-turbo Intake valve Opens Closes Exhaust valve Opens Closes Valve timing -Turbo Intake valve Opens Closes Exhaust valve Opens Closes Lubrication system Oil pump type Cooling system tiater pump type EGR type Injector type njector identification mark Non-turbo Turbo Throttle bore mm (in.) Throttle position sensor Closed throttle position switch

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6O”V. DOHC (per bank) 6 Compact type 2,972 (181.4) 91.1 x 76.0 (3.59 x 2.99) 10.0 8.0

16” BTDC 55” ABDC 48” BBDC 15” ATDC

16” BTDC 55” ABDC 50” BBDC 17” ATDC Pressure feed, full-flow filtration Trochoid type Water-cooled forced circulation Centrifugal impeller type Single type Electromagnetic, 6 BDH210 BDL360 60 (2.362) Variable resistor type Movable contact type

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6G7 ENGINE - Service Specifications

SERVICE SPECIFICATIONS mm (in.)

Cylinder head - SOHC Flatness of gasket surface Grinding limit of gasket surface * Total resurfacing depth of both cylinder head and cylinder block Overall height Oversize rework dimensions of valve guide hole (both intake and exhaust) 0.05 (.002) 0.25 (.OlO) 0.50 (.020) Oversize rework dimension of valve seat hole Intake 0.3 (.012) 0.6 (.024) Exhaust 0.3 (.012) 0.6 (.024) Cylinder head - DOHC Flatness of gasket surface Grinding limit of gasket surface * Total resurfacing depth of both cylinder head and cylinder block 3verall height Dversize rework dimensions of valve guide hole Iboth intake and exhaust) 0.05 (.002) 0.25 (.OlO) 0.50 (.020) 3versize rework dimension of valve seat hole Intake 0.3 (.012) 0.6 (.024) Exhaust 0.3 (.012) 0.6 (.024) Camshaft- SOHC Zam height Intake Exhaust lournal diameter Iii clearance dentification mark

Standard

Limit

Less than 0.05 (.0019)

0.2 (.008) *0.2 (.008)

84 (3.31)

13.05- 13.07 (.5138- .5147) 13.25 - 13.27 (5217 - .5224) 13.50 - 13.52 (.5315 - .5323) 44.30 44.60 38.30 38.60

-

44.33 (1.7441 - 1.7453) 44.63 (1.7559 - 1.7571) 38.33 (1.5079 - 1.5091) 38.63 (1.5197 - 1.5209)

Less than 0.03 (.0012)

0.2 (.008) “0.2 (008).

132 (5.20)

12.05 - 12.07 (.4744- .4752) 12.25 - 12.27 (4823 - .4831) 12.50 - 12.52 l.4921 - .4929) 36.30 - 36.33 (1.4291 - 1.4303) 36.60 - 36.63 (1.4409 - 1.4421) 33.30-33.33(1.3110-1.3122) 33.60 - 33.63 (1.3228 - 1.3240)

41.25 (1.6240) 41.25 (1.6240) 34 (1.34) 0.05 - 0.09 (.0020 - .0035) for DIAMANTE for MONTERO and TRUCK !

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40.75 (1.6043) 40.75 (1.6043)

667 ENGINE - Service SDecifications mm (in.)

Camshaft - DOHC Cam height Intake Exhaust

Standard

Limit

35.49(1.3972)*‘,34.91 (1.3744)**

34.99(1.3776)*' 34.41 (1.3547)"' 34.70 (1.3661)"' 34.41 (1.3!%7)"2

35.20(1.3858)*',34.91 (1.3744)*'

Journal diameter Oil clearance

26(1.02) 0.05-0.09(.020-.0035)

Rocker arm - SOHC I.D. Rocker arm-to-shaft clearance

18.91 -18.93(.7445-.7453) 0.01 -0.04(.0004-.0016)

Rocker shaft - SOHC 3.D. Dverall length

18.89-18.90 (.7437-.7441) 333.5(13.130)

Valve - SOHC 3verall length Intake Exhaust jtem diameter Intake Exhaust -ace angle stem-to guide clearance Intake Exhaust -hickness of valve head (Margin) Intake Exhaust lalve - DOHC Iverall length Intake Exhaust item diameter Intake Exhaust ace angle item-to guide clearance Intake Exhaust hickness of valve head (Margin) Intake Exhaust

0.10(.004)'

102.97 (4.0539) 102.67 (4.0421)

.

7.96-7.98(.3134-.3142) 7.93-7.95 (.3122-.3130) 45"-45.5" 0.03-0.06(.0012-.0024) 0.05-0.09(.0020-.0035)

0.10 (.0039) 0.15 (.0059)

1.2 (.047) 2.0 i.079)

0 . 7 (.028) 1 . 5 (.059)

106.28(4.1842) 105.40(4.1496) 6.57-6.58(.2587-.2591) 6.53-6.55(.2571 -.2579) 45"-45.5" 0.02-0.05(.0008-.0020) 0.05-0.09 (.0020-.0035)

0.10 i.0039) 0.15 i.0059)

1 .o l.039) 1.5 (.059)

0.5(.019) 1 .o i.039)

NOTE *I = Up to 1992 models “2 = from 1993 models

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667 ENGINE - Service SDecifications mm (in.)

Valve spring - SOHC Free length Load/Installed height Out-of-squareness

N/mm (Ibs./in.)

Valve spring - DOHC Free length Load/installed height Out-of-squareness

N/mm (Ibs.in.1

Valve seat Seat angle valve contact width Sinkage Service size Piston - SOHC 3.D. ‘iston-to-cylinder clearance Service size ‘iston - DOHC 3.D. ‘iston-to-cylinder clearance Service size

Limit

49.8 (1.961) 329/40.4 (725/l .591) Less than 2”

48.8 (1.921)

45.2 (1.780)*‘, 46.4 (1.827)“’

44.2 (1.740)*’ 45.4 (1.787)“’

240/37.9 (52.911.492) Less than 2”

Valve guide - SOHC Overall length Intake Exhaust I.D. O.D. Service size Valve guide - DOHC Overall length Intake Exhaust I.D. O.D. Service size

Standard

4”

4”

44 (1.73) 48 (1.89) 8.00 - 8.02 i.315 - .316) 13.06- 13.07 (.5142-.5146) 0.05 (.002), 0.25 LO1 0) 0.50 (.020) Oversize

45.5(1.791) 50.5 (1.988) 6.60 - 6.62 (.2598 - .2607) 12.06 - 12.07 (.4748 - .4752) 0.05 (.002), 0.25 LO1 0) 0.50 (.020) Oversize 44- 44.5” 0.9 - 1.3 (035 - ,051) 0.2 0.30 (.012), 0.60 t.024) Oversize 91 .I (3.587) 0.02 - 0.04 (.0008 - .0016) 0.25 (.OlO), 0.50 (.020) 0.75 (.030), 1 .OO l.039) Oversize 91 .I (3.587) 0.02 - 0.04 (.0008 - .0016) 0.25 LOlO), 0.50 f.020) 0.75 (.030), 1 .OO (039) Oversize

NOTE O.D. = Outer Diameter I.D. = Inner Diameter *I = Up to 1992 models “2 = From 1993 models

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6G7 ENGINE - Service Specifications

mm (in.)

Piston ring - SOHC End gap No. 1 ring No. 2 ring Front wheel drive vehicle Rear wheel drive vehicle Oil ring Front wheel drive vehicle Rear wheel drive vehicle Ring to ring groove clearance No.1 ring Front wheel drive vehicle Rear wheel drive vehicle No.2 ring

Standard

Limit

0.30-0.45(.0118-.0177)

0.8 (.031)

0.45 - 0.60 (.0177 - .0236) 0.25 - 0.45 LOO98 - .0177)

0.8 (.031) 0.8 (.031)

0.20 - 0.60 LOO79 - .0236) 0.20 - 0.70 (.0079 - .0276)

‘I .o (.039) 1 .o (.039)

0.03 - 0.07 LOOI 2 - .0028) 0.05 - 0.09 (0020 - .0035) 0.02 - 0.06 (.0008 - .0024)

0.1 (004) 0.1 (004) 0.1 (.004)

Piston ring - DOHC End gap No. 1 ring No. 2 ring Oil ring ?ing to ring groove clearance No. 1 ring No. 2 ring

0.30 - 0.45 (.0118 - .0177) 0.45 - 0.60 (.0177 - .0236) 0.20 - 0.70 (.0079 - .0276)

0.8 (.031) 1 .o (.039) 1 .o (039)

0.03 - 0.07 (.0012 - .0028) 0.02 - 0.06 (.0008 - .0024)

0.1 (.004) 0.1 (.004)

‘iston pin I.D. ‘Tess-in load N (Ibs.) ‘Tess-in temperature

22.001 - 22.007 (8662 - .8664) 75.00 - 175.00 (1,653 - 3,858) Room temperature

Connecting rod 3ig end center-to-small end center length 3end ‘wist jig end side clearance

140.9- 141 .o 0.05 (0020) or less 0.1 (004) or less 0.10 - 0.25 (.0039 - .0098)

Crankshaft !nd play ournal O.D. ‘in O.D. jut-of-roundness of journal and pin Two-camshaft engine Four-camshaft engine aper of journal and pin )il clearance of journal )il clearance of pin

0.05 - 0.25 (0020 - .0098) 60 (2.36) 50 (I .97) Less than 0.005 (.0002) Less than 0.003 (.OOOl) Less than 0.005 (.0002) 0.020 - 0.050 t.0008 - .0020) 0.020 - 0.050 (0008 - .0020)

NOTE O.D. = Outer Diameter

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0.4 (.016) 0.3 (.012)

0.1 (.004) 0.1 (.004)

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6G7 ENGINE - Service SDecifications mm (in.) Standard

Cylinder block Cylinder bore Flatness of gasket surface Grinding limit of top surface * Total resurfacing depth of both cylinder head and cylinder block

Limit

91.1 (3.587) 0.05 (.002) “0.2 (.008)

Oil pump Tip clearance Side clearance Body clearance

0.03 - 0.08 (0012 - .0031) 0.04-0.10 (.0016- .0039) 0.10 - 0.18 (0040 - .0070)

Drive belt - SOHC for DIAMANTE Deflection New belt Used belt Tension gauge N (Ibs.) New belt Used belt

4.0-5.0(.157-,197) 7.0 (276) 700 - 900 (154 - 198) 500 (I IO)

Drive belt - SOHC for MONTERO and TRUCK Deflection New belt Used belt Tension gauge N (Ibs.) New belt Used belt

6.5 - 8.0 (.256 - ,315) 9.0 (.354) 500-700(110-154) 400 (88)

Irive belt - DOHC Ieflection New belt Used belt rension N (Ibs.) New belt Used belt

650 - 850 (143 - 187) 450 - 500 (99 - 132)

njector Zoil resistance Non-turbo R Turbo R

13 - 16 at 20°C (68°F) 2 - 3 at 20°C (68°F)

dle air control motor Ioil resistance R

28 - 33 at 20°C (68°F)

-hrottle position sensor tesistance kS1

3.5 - 6.5

rccelerator pedal position sensor lesistance kR

3.5-6.5

‘ariable induction control motor (esistance fi

5 - 35 at 20°C (68°F)

3.5-4.0(.138-,157) 4.0-5.0(.157-,197)

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0.35 (0138)

667’ ENGINE - Torque Specifications

TORQUE SPECIFICATIONS Nm

ftlbs.

Generator and drive belt Cooling fan bolt Fan pulley bolt

11 11

8 8

Tensioner pulley nut SOHC DIAMANTE, DOHC

50

36

45

33

42 24 42 19

30 17. 30 14 ,’

45 50 42 24 23

33 36 30 17 17

lrankshaft bolt SOHC DOHC

14 10 13 24 45 155 185

IO 7 9 17 33 122 134.

ntake manifold plenum and throttle body iGR pipe bolt ntake manifold plenum stay bolt !GR valve bolt -hrottle body bolt SOHC MONTERO AND TRUCK gnition coil bolt gnition power transistor bolt

18 18 22 12 14 2.5 5

13 13 16 8 10 1.8 3.6

-hrottle body ‘hrottle position sensor bolt Ye air control motor bolt SOHC DIAMANTE DOHC Non-TURBO \ccelerator pedal position sensor bolt ‘acuum actuator bolt

2 3.5 2.5 2 3.5

1.4 2.5 1.8 1.4 2.5

SOHC MONTERO AND TRUCK Tensioner bracket bolt SOHC DIAMANTE SOHC MONTERO AND TRUCK Ml0 Ml2 DOHC Idler pulley bolt SOHC MONTERO AND TRUCK DOHC Cooling fan bracket bolt Tensioner bracket stay bolt Generator pivot nut Generator brace bolt

.F-’

SOHC DIAMANTE SOHC MONTERO AND TRUCK- Side bolt - Exhaust manifold tightening side bolt Generator bracket bolt

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il filler bolt locker cover bolt Iistributor adaptor bolt locker arm shaft and bearing cap bolt

9 9 13 20

7 7 9 14

Camshafts, rocker arms and bearing caps- DOHC lrankshaft position sensor adaptor bolt learing caps, front and rear bolt rearing cap bolts No. 2, 3,4

24 20 11

17 14 8

lylinder head and valve- SOHC :ylinder head bolt

110

80

110 125 + Back off + 125

80 90 + Back off .--* 90

Exhaust manifold Oil levelgauge guide bolt Heat protector bolt Engine hanger bolt

:ylinder head and valve - DOHC :ylinder head bolt NON-TURBO TURBO

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667 ENGINE - Torque Specifications Nm

ft.lbs.

75

54

MONTERO AND TRUCK Oil pressure gauge unit DIAMANTE AND 3000GT MONTERO Oil cooler by-pass valve Oil filter bracket stay bolt (10x20) (8x20)

19 IO

14 7

10 55 55 23 13

7 40 40 17 IO

Oil filter bracket bolt DIAMANTE AND 3000GT MONTERO AND TRUCK mark 4 mark 7 Drain plug Oil pan bolt Oil screen bolt Plug Oil pump case bolt Oil pump cover bolt

24 24 14 40 6 19 45 14 10

17 17 10 29 4 14 33 10 7

Piston and connecting rod Connecting rod cap nut

52

38

Crankshaft, flywheel and drive plate +wheel bolt Irive plate bolt 3ear plate bolt 3ell housing cover bolt 3il seal case bolt 3earing cap stay bolt 3earing cap bolt - SOHC DOHC 1993 models DOHC -TURBO knock sensor bracket bolt knock sensor

75 75 11 9 11 48 79 93 74 29 23

54 54 8 7 8 35 57 67 54 21 17

23 29 42 75

17 21 30 54

Oil pan and oil pump Transmission stay bolt Oil pressure switch DIAMANTE AND 3000GT

Bracket Knock sensor - DIAMANTE and 3000GT knock sensor bracket bolt - DIAMANTE and 3000GT loll stopper bracket - M 10 Ml2

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667 ENGINE - Sealant

SEALANT

,.

Items

Specified sealant

Auto tensioner bolt -Turbo Engine coolant temperature sensor Engine coolant temperature gauge unit Rocker cover Bearing cap Oil pressure switch Oil pressure gauge unit Oil pan Oil seal case

3M ATD Part No. 8660 3M NUT Locking Part No.41 71 3M ATD Part No.8660 3M ATD Part No.8660 3M NUT Locking Part No.41 71 3M ATD Part No.8660 3M ATD Part No.8660 MITSUBISHI GENUINE Part No.MD970389 MITSUBISHI GENUINE Part No.MD970389

Quantity As required As required As required As required As required As required As required As required As required

,

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6G7 ENGINE - SDecial Tools

SPECIAL TOOLS

SOHC engine only MD99871 9 or

Leak-down tester

Air bleed wire

Camshaft oil seal installer

For SOHC engine only

ton and timing belt For SOHC engine only

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8G7 ENGINE - Special Tools Tool

I

Number and tool name

Supersession

Application

MD99871 7 Crankshaft front oil seal installer

MD99871 7-01

Installation of crankshaft front oil seal

MD99871 8 Crankshaft rear oil seal installer

MD998718-01 Use with MB990938, 01

IInstallation of crankshaft rear oil seal

MD998719 Pulley holding pins (2)

MIT308239

iolding camshaft sprocket when loosening x torquing bolt -or SOHC engine only

MD998727 Oil pan remover

fqemoval of oil pan

M D998729 Valve stem seal installer

nstallation of valve stem seal :or SOHC engine only

MD998735 Valve spring compressor

MD998735-01

M D998754 Pulley holding pins (2)

M IT308239

MD998761 Camshaft oil seal installer

MD998761-01

M D998762 Circular packing installer

M D998762-01

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lemoval and installation of valve and rejted parts

l-lolding crankshaft sprocket when loosenirlg or torquing bolt

lstallation of camshaft oil seal or DOHC engine only

Installation of circular packing For DOHC engine only

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6G7 ENGINE - Special Tools

seal installer

compressor

Installation of flywheel

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667 ENGINE - Generator and Drive Belt

GENERATOR AND DRIVE BELT REMOVAL AND INSTALLATION - SOHC for DIAMANTE

3

1

2

il

23 Nm

7 155 Nm 112 ft.lbs.

30 ft.lbs. 8

Removal steps +A4 I. Drive belt 2. Tensioner pulley 3. Adjusting bolt 4. Adjusting stud 5. Tensioner bracket 6. Pivot bolt 7. Generator 8. Generator brace QArJ +B4 9. Crankshaft bolt 10. Special washer 11. Crankshaft pulley

I

14 Nm 10 ft.lbs.

7EN0487

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6G7 ENGINE - Generator and Drive Belt

tEMOVAL AND INSTALLATION - SOHC for MONTERO and TRUCK

13 Nm 9 ftlbs. 13 13 Nm 9 ftlbs. I

12

I IONm 7 ftlbs.

Removal steps 1. Drive belt 2. Cooling fan 3. Fan clutch 4. Fan pulley 5. Idler pulley 6. Tensioner pulley 7. Adjusting bolt 8. Adjusting stud 9. Tensioner bracket 0. Cooling fan bracket assembly 1. Tensioner bracket stay 2. Generator brace 3. Generator 4. Crankshaft bolt 5. Special washer 6. Crankshaft pulley 7EN0488

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6G7 ENGINE - Generator and Drive Belt IEMOVAL AND INSTALLATION i DOHC

23 Nm 17 ft.lby

24 Nm 17 ftlbs. 24 Nm 17 ft.lbs. I

4

8

I

45 Nm 33 ft.lbs. 50 Nm 36 klbs. \

2 50 Nm

I 165 Nm 134ft.lbs.

Removal steps #A4 1. Drive belt 2. Idler pulley 3. Tensioner pulley 4. Adjusting bolt 5. Adjusting stud 6. Tensioner bracket 7. Generator 8. Generator bracket 9. Bracket (IA(J #64 IO. Crankshaft bolt 11. Special washer 12. Crankshaft pulley

7EN0489

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6G7 ENGINE - Generator and Drive Belt REMOVAL SERVICE POINT (JAO CRANKSHAFT BOLT LOOSENING (1) Using the special tool, hold the drive plate or flywheel.

(2) Remove the crankshaft bolt.

INSTALLATION SERVICE POINT #A4 DRIVE BELT TENSION ADJUSTMENT

SOHC for DIAMANTE

DRIVE BELT - TENSION CHART Deflection mm (in.)

Generator drive belt SOHC for DIAMANTE

New USed

SOHC for New MONTERO USed and TRUCK NTERO and TRUCK

DOHC

DOHC

New Used

I

TenEo;bt;uge I

4.5 (.16-.20) 7 l.28)

700-900(154-198) 500 (110)

6.5-8.0(.26-.32) 9(.35)

500-700(110-154) 400(88)

3.5-4.0(.14-.16) 4-5(.16-.20)

650-850(143-187) 450-600(99-132)

(1) Loosen the tensioner pulley locking nut. (2) Tighten the adjusting bolt to adjust the belt deflectbn to the specification shown in the chart.

IOON

7EN0349

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6G7 ENGINE - Generator and Drive Belt (3) If you use a tension gauge, tighten the adjusting bblt to adjust the belt tension to the specification shown .:.in the chart.

SOHC for DIAMANTE-

w gauge Tension’ w

7EN0399

SOHC for MONTERO and TRUCK

7EL0070 DOHC

I)B4 CRANKSHAFT BOLT TIGHTENING (1) Using the special tool, hold the drive plate or flywheel. (2) Install the crankshaft bolt.

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6G7 ENGINE - Intake Manifold Plenum and Throttle Body

INTAKE MANIFOLD PLENUM AND THROTTLE BODY REMOVAL AND INSTALLATION - SOHC for DIAMANTE

8 12 Nm 8 ft.lbs.

18 Nm

I

22 Nm 16 ftlbs.

5Nm 3.6 ft.lbs.

18Nm 13 ft.lbs.

Removal steps For California 1. EGRpipe 2. Ignition coil 3. High tension cable 4. Intake manifold plenum stay, rear 5. Intake manifold plenum stay, front 6. EGR valve 7. EGR valve aasket 1 For California 8. Throttle body 9. Throttle body gasket 10. Ignition power transistor 11. Intake manifold plenum 12. Intake manifold plenum gasket 7EN0405

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6G7 ENGINE - Intake Manifold Plenum and Throttle Body IEMOVAL AND INSTALLATION - SOHC for MONTERO and TRUCK

14 Nm 10 ft.lbs.

tr-

18 Nm 13 ft.lbs.

18 Nm

22 Nm 16 ft.lbs.

Removal steps 1. EGR pipe For California 2. EGR pipe gasket I 3. Intake inariifold plenum stay, rear 4. Intake manifold plenum stay, front 5. EGR valve 6. EGR valve gasket > For California 7. Throttle body 8. Throttle body gasket 9. Intake manifold plenum 10. Intake manifold plenum gasket 7EN0408

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6G7 ENGINE - Intake Manifold Plenum and Throttle Body

{EMOVAL AND INSTALLATION - DOHC NON-TURBO

12 Nm 8 ft.lbs. I

6

8Nm 3 ftlbs.

22 Nm 16 ft.lbs.

18Nm 13 ft.lbs.

3

18Nm 13 ftlbs.

Cb,18Nm 13 fklbs. Removal steps 1. EGR pipe For California 2. Intake manifold plenum stay, rear 3. Intake manifold plenum stay, front 5. EGR valve For California 6. EGR valve gasket I 7. Throttle body 8. Intake manifold plenum 9. Intake manifold plenum gasket 7EN0411

TSB Revision

6G7 ENGINE - Intake Manifold Plenum and Throtiib B’ijdy

qq-ps5

IEMOVAL AND FUEL SYSTEM - DOHC TURBO

m2-?&

18hm 13 ftlbs.

18Nm 13 ft.lbs.

18 Nm 13 ftlbs. Removal steps 1. EGRpipe For California j 2. EGR pipe gasket 3. Intake manifold plenum stay, rear 4. Intake manifold plenum stay, front 5. EGR valve For California I 6. EGR valve aasket 7. Throttle bo?iy 8. Throttle body gasket 9. Intake manifold plenum 10. Intake manifold plenum gasket

1 TSB Revision I.

I1

11 E-36

6G7 ENGINE - Intake Manifold Plenum and Throttle Body INSPECTION EGR VALVE (1) Check the EGR valve for sticking or carbon deposits. If such conditions exist, clean or replace the EGR valve. (2) Connect a hand vacuum pump to the nipple of the EGR valve and plug other nipple. (3) If there is vacuum leakage, replace the EGR valve. (4) Blow air in from one passage of the EGR to check its condition as follows. 6EM0384

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667 ENGINE - Throttle Body

n-E-37

THROTTLE BODY DISASSEMBLY AND REASSEMBLY - SOHC for DIAMANTE, DOHC NON-TURBO

2.5 Nm 1.8 ft.lbs.

2Nin 1.4ft.lbs.

Disassembly steps QArJ +A4 1. Throttle position sensor 2. Idle air control motor 3. Throttle body @O

7FU1282

DISASSEMBLY AND REASSEMBLY - For VEHICLES with TRACTION CONTROL

4 I

ii+--

3.5 Nm 2.5 ftlbs. 3.5 Nm 2.5 ft.lbs.

!Nm 1.4 ft.lbs.5 Disassembly steps 1. Water hose sensor #B4 6. Throttle body

1.4 ft.lbs. 7FU1283

TSB Revision

6G7 ENGINE - Throttle Body

11 E-38

DISASSEMBLY AND REASSEMBLY - DOHC TURBO

Disassembly steps Up to 1992 models 3. Vacuum valve 4. Dash pot- From 1993 models (IAO )A4 5. Throttle position sensor 6. Idle air control motor 0 7. Throttle body

DISASSEMBLY AND REASSEMBLY - SOHC for MONTERO and TRUCK 3.5 Nm 2.5 ftlbs.

3 I

n

Disassembly steps OAO )B4 1. Throttle position sensor (Within closed throttle position switch) 2. Idle air control motor assembly 3. Throttle body

1 /T’ cz!J

2Nm 1.4 ft.lbs.

7FUO532

1 TSB Revision

I

6G7 ENGINE - Throttle Body DISASSEMBLY SERVICE POINTS OAo THROlTLE POSITION SENSOR, ACCELERATOR

PEDAL POSITION SENSOR AND IDLE AIR CONTROL MOTOR REMOVAL (1) Do not d’rsassemble the sensor and motor. (2) Do not clean the sensor and motor by dipping them into the solvent. Clean them with shop towel.

(%r) THROlTLE BODY REMOVAL (1) Do not remove the throttle valve. (2) Check if the vacuum port or passage is clogged. Use compressed air to clean the vacuum passage.

INSPECTION DASH POT - DOHC TURBO Up to 1992 models (1) Push the rod of the dash pot all the way in and close the nipple with the fingers, (2) If the rod does not protrude after releasing it, the dash pot is functioning normally. (3) If the rod protrudes, a broken diaphragm is suspected. Therefore, replace the dash pot. \

7FU105i

From 1993 models (1) Push the dash pot rod in lightly and confirm the resistance. NOTE 1. Resistance increases as the rod is pushed harder. 2. If the rod can be pushed in with no resistance, either the diaphragm or check valve is faulty. (2) Release finger and confirm that the rod returns to its original position quickly. NOTE If the rod returns slowly, the check valve is faulty.

TSB Revision

IIE-40

6G7 ENGINE - Throttle Bodv

6EM069

VACUUM VALVE - DOHC TURBO Up to 1992 models (1) Remove the filter from the vacuum valve. (2) Connect a hand vacuum pump to the black nipple of the vacuum valve. (3) With the other nipple closed by the finger, apply a negative pressure of 500 mmHg (19.7 in.Hg.) to make sure that the negative pressure is maintained. (4) Let go your finger and make sure that the negative pressure leaks out gradually. (5) Disconnect the hand vacuum pump and connect it to the green nipple. (6) Make sure that the negative pressure leaks out as soon as it is applied. (7) Remove the hand vacuum pump from the valve. (8) Install the filter onto the black nipple of the valve.

IDLE AIR CONTROL MOTOR Checking the Coil Resistance (1) Connect Test Harness to the motor connector. (2) Measure the resistance between the white clip of Test Harness and the red clip or blue clip. Standard value: 28 - 33 LR at 20°C (68°F) (3) Measure the resistance between the green clip of Test Harness and the yellow clip or black clip. Standard value: 28 - 33 LR at 20°C (68°F)

Red

M D998463

7FUO29(

Operational Check (1) Connect Test Harness to the idle air control motor connector. (2) Connect the positive 0 terminal of 6 volt battery to the white clip and the green clip of Test Harness. Idle air mot01 MD998463

7FUOO71

1 TSB Revision

I

6G7 ENGINE - Throttle Body

7FUO29f

1 gs41

(3) Hold the idle air control motor as shown in the illustration, connect the negative 0 terminal of the power supply to each clip as described in the following steps, and check whether or not a vibrating feeling (a feeling of very slight vibration of the stepper motor) is generated as a result of the activation of the stepper motor. @ Connect the negative 0 terminal of the power supply to the red and black clip. @ Connect the negative 0 terminal of the power supply to the blue and black clip. @ Connect the negative 0 terminal of the power supply to the blue and yellow clip. @ Connect the negative 0 terminal of the power supply to the red and yellow clip. @ Connect the negative 0 terminal of the power supply to the red and black clip. @ Repeat the tests in sequence from @ to 0. (4) If, as a result of these tests, vibration is detected, the stepper motor can be considered to be normal.

CHECKING VACUUM ACTUATOR - VEHICLES with TRACTION CONTROL (1) With the throttle valve opened, apply a vacuum of 200 mmHg (7.9 in.Hg.) to the vacuum actuator to make sure that the throttle valve closes. (2) Then lower the level of vacuum gradually to make sure that the vacuum actuator opens.

REASSEMBLY SERVICE POINTS

I)A4 THROTTLE POSITION SENSOR (TPS) INSTALLATION - SOHC for DIAMANTE, DOHC (1) Install the throttle position sensor to the throttle body as shown in the illustration.

w

7FUlb3Z “’ I

(2) Turn the throttle position sensor 90” clockwise to set it, and tighten the screws.

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11 E-42

6G7 ENGINE - Throttle Bodv

Throttle position

(3) Connect a circuit tester between 4 (ground) and 2 (output), or between 2 (output) and 1 (power). Then, make sure that the resistance changes smoothly when the throttle valve is slowly moved to the fully open position. (4) Check for continuity across terminals 3 (closed throttle position switch) and 4 (ground) with the throttle valve both fully closed and fully open.

Ground

I

Throttle position sensor output

Closed throttle position switch 7FU053E

Throttle valve position

Continuity

Fully closed

Conductive

Fully open

I

Non-conductive

If there is no continuity with the throttle valve fully closed, turn TPS counterclockwise, and then check again. NOTE Some throttle position sensors are not provided with the position switch. In that case, the check described in step (4) cannot be accomplished. (5) If the above specifications are not met, replace TPS.

I)B4 ;rNHslA~-EP$tSITION

SENSOR (TPS)

- SOHC for MONTERO and TRUCK (1) Install the throttle position sensor to the throttle body as shown in the illustration.

7FUO53:

(2) Turn the throttle position sensor 90” counterclockwise to set it, and tighten the screws.

I

I

Ground \

Closed throttle position switch

I

7FUO53L

Throttle position sensor outmt

!I (3) Connect a circuit tester between @ (ground) and @ (output), or between @ (output) and @ (power). Then, make sure that the resistance changes smoothly when the throttle valve is slowly moved to the fully open position. (4) Check for continuity across terminals @ (closed throttle position switch) and @ (ground) with the throttle valve both fully closed and fully open.

\ Throttle position sensor power 7FU053E

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1

I

w43

6G7 ENGINE - Throttle Body

)r”““-’ If there is no continuity with throttle valve fully closed, turn the throttle position sensor clockwise, and then check again. (5) If the above specifications are not met, replace TPS. I)c4 ACCELERATOR PEDAL POSITION SENSOR (APS) INSTALLATION (1) Install the accelerator pedal position sensor to the throttle body as shown in the illustration.

7FU1071

(2) Turn the accelerator pedal position sensor 90” clockwise to set it, and tighten the screws.

7FU107:

Closed throttle

Accelerator

pedal position sensor output

(3) Connect a circuit tester between (ground) and (output), or between (output) and (power). Then, make sure that the resistance changes smoothly when the throttle valve is slowly moved to the fully open position. (4) Check for continuity across terminals (closed throttle position switch) and (ground) with the throttle valve both fully closed and fully open.

7~~053~

Throttle valve position

Continuity

Fully closed

Conductive

Fully open

Non-conductive

If there is no continuity with the throttle valve fully closed, turn APS counterclockwise, and then check again. (5) If the above specifications are not met, rep!ace APS.

1 TSB Revision

6G7 ENGINE - Ignition System

11 E-44 IGNITION SYSTEM SOHC for DIAMANTE

25 Nm 18 ft.lbs.

Removal steps 1. Spark plug cables 2. Spark plug 3. Distributor 4. O-ring 7EN0406

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I

6G7 ENGINE - Ignition Svstem ;OHC for MONTERO AND TRUCK

25 Nm 18 ft.lbs.

Removal steps 1. Spark plug cables 2. Spark plugs 3. High tension cable *A4 4. Distributor 5. O-ring 6. Ignition coil 7EN0409

\ TSB Revision I

11 E-46

667 ENGINE - Ignition System

IOHC for DIAMANTE A N D 3000GT

13 Nm 9 ft.lbs.

Removal steps 1. Center cover 2. Spark plug cables 3. Soark oluas 4. Ciamp’ um From 1993 models 5. Ignition coil 6. Engine hanger 7. Ignition power transistor- DIAMANTE 8. ignition power transistor _ 3000GT eB4 9. Crankshaft position sensor- Up to 1992 models 10. O-ring

7EN0492 I

1 TSB Revision L

II

6G7 ENGINE - Ignition Svstem

WE-47

INSTALLATION SERVICE POINTS I)A4 DISTRIBUTOR INSTALLATION - SOljC (1) Turn the crankshaft so that the No. 1 cylinder is at compression top dead center. (2) Align the distributor housing and gear mating marks. (3) With the stud located in the center of the adjusting slot at the distributor, install the distributor.

I)B4

;;RAFKSHAFT POSITION SENSOR INSTALLATION -

(1) Turn the crankshaft so that the No. 1 cylinder is at compressi,on top dead center. (2) Install, lining up the matchmarks on the crankshaft position sensor housing and the coupling.

Mating mark

7FI OOWi I

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6G7 ENGINE - Timing Belt - SOHC

11 E-48

TIMING BELT - SOHC REMOVAL AND INSTALLATION - DIAMANTE

I

26 Nm 19 ft.lbs. 110 Nm 80 ftlbs.

4F 6

Removal steps +D4 1. Engine support bracket 2. Access cover 3. Timing belt front upper cover, right 4. Timing belt cover cap 5. Timing belt front upper cover, left 6. Timing belt front lower cover 7. Flange 4AO &CC 8. Timing belt iB4 9. Tensioner 10. Tensioner spring 11. Crankshaft sprocket QBrJ #A4 12. Camshaft sprocket bolt 13. Camshaft sprocket 14. Timing belt rear cover, left 15. Timing belt rear cover, right

7EN0493

TSB Revision

6G7 ENGINE - Timing Belt - SOHC IEMOVAL AND INSTALLATION - MONTERO AND TRUCK

25 Nm 18 ft.lbs.

14 I

11 Nm 8 ftlbs.

19 ft.lbs.

Removal steps 1. Access cover 2. Timing belt front upper cover, right 3. Timing belt front upper cover, left 4. Timing belt front lower cover 5. Flange @IO #C4 6. Timing belt eB4 7. Tensioner 8. Tensioner spring 9. Crankshaft sprocket (IBIJ +A4 10. Camshaft sprocket bolt 11. Camshaft sprocket 12. Timing belt rear upper cover, left 13. Generator stay 14. Generator bracket

4

7EN0494

TSB Revision

WE-50

6G7 ENGINE - Timing Belt - SOHC REMOVAL SERVICE POINTS TIMING BELT REMOVAL (1) Mark the belt running direction for reference in reinstallation. NOTE (1) Water or oil on the belt shortens its life drastically, so the removed timing belt, sprocket, and tensioner must be kept free from oil and water. Do not immerse parts in cleaning solvent. (2) If there is oil or water on any part, check the front case oil seal, camshaft oil seal and water pump for leaks.

(IAO

,

~BI) CAMSHAFT SPROCKET BOLT REMOVAL

MB990775-01

INSPECTION

EJ 0 0 008 G

TIMING BELT Replace belt if any of the following conditions exist. (1) Hardening of back rubber-back side is glossy without resilience and leaves no indent when pressed with fingernail.

(2) (3) (4) (5)

Cracks Cracks Cracks Cracks

on rubber back or peeling of canvas on tooth bottom on belt

(6) Abnormal wear of belt sides. The sides are normal if they are sharp as if cut by a knife.

Abnormal wear (Fluffy strand)

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6G7 ENGINE - Timing Belt - SOHC (7) Abnormal wear on teeth (8) Tooth missing and canvas fiber exposed.

Rubber exposed Tooth missing and canvas fiber exposed

INSTALLATION SERVICE POINTS +A4 CAMSHAFT SPROCKET BOLT INSTALLATION

01w70:

I)B4 TIMING BELT TENSIONER INSTALLATION (1) Insert a screwdriver into the hole of the timing belt tensioner arm, move it all the way in the direction of the arrow, and tighten the tensioner lock bolt to temporarily hold this position.

1 TSB Revision

I

11 E-52

6G7 ENGINE - Timina Belt - SOHC I)cg TIMING BELT INSTALLATION (1) Align the timing marks of the camshaft sprockets and the crankshaft sprocket. (2) Install the timing belt on the crankshaft sprocket first and while keeping the belt tight on the tension side, install the belt on the left camshaft sprocket. (3) Then, install on the water pump pulley and on the right camshaft sprocket and finally on the timing belt tensioner.

Timing mark (on belt cover) Timing mark (on rear cover or generator bracket)

I ImIng maw (on sprocket)

\

/ Camshaft sprocket (wht)

Camshaft sprocket (left)

side Timing belt tensioner (on front case)

(on sprocket)

Crankshaft sprocket

(4) Install the flange onto the front end of the crankshaft. (5) Install the special tool onto the crankshaft. (6) Loosen the tensioner lock bolt one or two turns and allow the spring to tension the timing belt. (7) Turn the crankshaft two full turns clockwise. Turn smoothly and in clockwise direction only. (8) Again line up the timing marks on the sprockets and tighten the tensioner lock bolt to the specified torque.

TSB Revision

6G7 ENGINE - Timing Belt - SOHC I)D4 ENGINE SUPPORT BRACKET INSTALLATION - DIAMANTE (I) Tighten the engine support bracket bolts in the order shown in the illustration. NOTE The bolt used at the location shown in the illustration is a reamer bolt (head mark “R”).

ad ,I mark

7EN024:

il

\ TSB Revision

11 E-54

6G7 ENGINE - Timing Belt - DOHC

TIMING BELT - DOHC REMOVAL AND INSTALLATION - Up to 1992 models

3Nm 2 ft.lbs.

90 Nm 65 ftlbs. 24 17 RS. /

15

A

6

49 Nm 35 ft.lbs.

i 55 Nm 40 ftlbs.

Removal steps I)E4 1. Engine support bracket 2. Timing belt front upper cover, right 3. Timing belt front upper cover, left 4. Timing belt front lower cover 4AO $04 5. Timing belt +C4 6. Auto tensioner 7. Tensioner pulley 8. Tensioner arm assembly 9. Idler pulley 10. Idler pulley bracket

TSB Revision

30 ft.lbs.

11. Crankshaft sprocket #B4 12. Rocker cover 13. Rocker cover gasket, A 14. Rocker cover gasket, B (IB~J *A4 15. Camshaft sprocket bolt 16. Camshaft sprocket 17. Timing belt rear cover, right 18. Timing belt rear cover, left 19. Bracket 20. Timing belt rear cover, center I

7EN0497

667 ENGINE - Timing Belt - DOHC tEMOVAL AND INSTALLATION - From 1993 models 3Nm 2 klbs.

3Nm 2 ft.lbs.

25

24 Nm 17 ft.lbs.

10 46Nm 35 ft.lbs.

15 14

r 55 Nm 40 ft.lbs.

421 Nm 30 ft.lbs.

r

ap

5 2 IlONm 60 ft.lbs. Removal steps eE4 1. Engine support bracket 2. Crankshaft position sensor bracket 3. Timing belt front upper cover, right 4. Timing belt front upper cover, left 5. Timing belt front lower cover OAo eD4 6. Timing belt 7. Crankshaft position sensor 8. Camshaft position sensor 1 TSB Revision

+C4 9. Auto tensioner IO. Tensioner nrrllev 11. Tensioner arm assembly 12. Idler pulley 13. Idler pulley bracket 14. Crankshaft sprocket 15. Sensing plate 16. Washer #B4 17. Rocker cover 18. Rocker cover gasket, A 19. Rocker cover gasket, B (rBr) +A4 20. Camshaft sprocket bolt 21. Camshaft sprocket 22. Camshaft sprocket 23. Timing belt rear cover, right 24. Timing belt rear cover, left 25. Bracket 26. Timing belt rear cover, center

7ENO498

6G7 ENGINE - Timina Belt - DOHC REMOVAL SERVICE POINTS aA0 TIMING BELT REMOVAL (1) Mark the belt running direction for reference in reinstallation. NOTE (1) Water or oil on the belt shortens its life drastically, so the removed timing belt, sprocket, and tensioner must be kept free from oil and water. Do not immerse parts in cleaning solvent. (2) If there is oil or water on any part, check the front case oil seal, camshaft oil seal and water pump for leaks.

OBr) CAMSHAFT SPROCKET BOLT REMOVAL (1) Hold the hexagonal portion of the camshaft with a wrench, when removing the camshaft sprocket bolt.

INSPECTION TIMING BELT Refer to “INSPECTION” on page IIE-50.

AUTO-TENSIONER (1) Check for oil leaks. If oil leaks are evident, replace the auto-tensioner. (2) Check the rod end for wear or damage and replace the auto-tensioner if necessary. (3) Measure the rod projection length. If the reading is outside the standard value, replace the auto tensioner. Standard value: 11.7 - 12.3 mm (.461 - .484 in.) 7EN0224

(4) Use a vice to force the auto tensioner rod in. If the rod slides in easily, replace the tensioner. If there is nothing wrong, the rod will offer considerable resistance.

7ENO775

TSB Revision

6G7 ENGINE - Timing Belt - DOHC

ljl51 ;_,

INSTALLATION SERVICE POINTS I)A4 CAMSHAFT SPROCKET BOLT TIGHTENING (1) Hold the hexagonal portion of the camshaft with a wrench when tightening the camshaft sprocket bolt. Tighten the bolt to the specified torque.

+B4 ROCKER COVER INSTALLATION (1) Apply sealant to the areas shown in the illustration. Specified sealant: 3M ATD Part No.8660 or equivalent. Apply sealant

7-G

7EN024

(2) Tighten the rocker cover bolts in the sequence shown in the illustration.

Spark plug holes

7EN024’ I

I)c4 AUTO-TENSIONER INSTALLATION If the auto-tensioner rod is fully extended, set it in the retracted position with the following procedure. (1) Set the auto tensioner in a vice.

II

I

7EN022E

(2) Slowly close the vice to force the rod in until the set hole (A) of the rod is lined up with the set hole (B) of the cylinder. (3) Insert a wire [I .4 mm (.055 in.) in diameter] into the set holes. (4) Remove the auto tensioner from the vice. (5) On engines with turbocharger, apply sealant to the threads of the auto tensioner mounting bolt. Specified sealant: 3M ATD Part No.8660 or equivalent. 7EN022i

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11 E-58

6G7 ENGINE - Timing Belt - DOHC I)04 TIMING BELT INSTALLATION (1) Using the special tool, line up the crankshaft sprocket timing marks, and then rotate the sprocket one tooth counterclockwise.

(2) Line up the timing marks of the camshaft sprockets for left bank.

(3) Using two wrenches, line up the timing marks of the camshaft sprockets for right bank. Caution 1. Since valve spring force can turn the camshaft sprocket, be careful not to catch your finger. 2. If either camshaft sprocket is rotated one complete turn clockwise or counterclockwise after lining up the timing marks of the other camshaft sprocket, the intake and exhaust valves might interfere. Consequently, if a camshaft sprocket was turned too far in lining up the timing marks, be sure to rotate it back from that position to line up again the timing marks.

(4) Install the timing belt on the exhaust side camshaft sprocket for right bank and hold it with a paper clip at the position shown in the illustration. (5) Install the timing belt on the intake side camshaft sprocket and hold it with a paper clip at the positions shown in the illustration. Caution Since the camshaft sprocket turns easily, avoid excessive pulling on the timing belt.

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6G7 ENGINE - Timing Belt - DOHC (6) Check that the timing marks of the camshaft sprockets for left bank are in alignment. Then install the timing belt on these sprockets and hold it with a paper clip at the positions shown in the illustration. (7) Install the timing belt on the idler pulley. (8) Install the timing belt on the crankshaft sprocket. (9) Install the timing belt on the tensioner pulley.

(1O)Using the special tool, rotate the tensioner pulley clockwise to tighten the center bolt. (1 l)Remove the four paper clips.

(12)Using the special tool, turn the crankshaft a quarter turn counterclockwise. Then rotate it clockwise to line up the timing marks and check that all the timing marks are in alignment.

1 TSB Revision

6G7 ENGINE - Timing Belt - DOHC

11 E-60

Timing marks (on right rocker cover)

Camshaft sprocket

Timing marks (on left rocker cover)

Timing mark (on sprocket)

Auto tensioner Timing mark (on oil pump case)

(on sprocket) Crankshaft sprocket ’

7EN0235

(13)Loosen the center bolt of the auto-tensioner pulley, and install the special tool and a torque wrench on the pull’ey. While holding the pulley with approximately 10 Nm (7 ftlbs.) torque to prevent it from turning, tighten the center bolt to the specified torque.

(14)Turn the crankshaft two turns clockwise, and leave it alone for about five minutes. Then move in and out the auto-tensioner setting metal wire to check that the wire moves smoothly. NOTE If the metal wire does not move smoothly, repeat step (12) until it does move smoothly. (15)Remove the auto tensioner setting metal wire.

TSB Revision

6G7 ENGINE - Timing Belt - DOHC (16)Check that the spacing between the tensioner arm antfaulo tensioner is within the standard limit. Standard value: 3.8 - 4.5 mm (.I50 - .I77 ‘in.) *.

r)E4 ENGINE SUPPORT BRACKET INSTALLATION

ad I, mark

(1) Tighten the engine support bracket bolts in the order shown in the illustration. NOTE The bolt used at the location shown in the illustration is a reamer bolt (head mark “R”).

7EN024:

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I

6G7 ENGINE - Intake Manifold and Fuel Parts

11 E-62

INTAKE MANIFOLD AND FUEL PARTS REMOVAL AND INSTALLATION - SOHC for DIAMANTE

-@-I-10

I/ 9Nm 7 ftlbs.

I2

__/J c1 / ,I5

8Nm 8 ftlbs. 19 Nm 14 ftlbs.

16

18

Removal steps 1. injector harness 2. Injector and fuel rail 3. insulator eG4 4. Fuel pressure regulator 5. O-ring 6. Insulator eF4 87. lnj;e;rs 9: Gromet 10. Fuel pipe 11. O-ring 12. Fuel rail *D4 13. Engjne coolant temperature gauge unit +C4 14. Engrne coolant temperature sensor *I34 15. Therm0 switch 16. Water outlet fitting 17. Water outlet fitting gasket 18. Thermostat 19. Intake manifold 20. Intake manifold gasket 7EN0499

1 TSB Revision

7

6G7 ENGINE - Intake Manifold and Fuel Parts IEMOVAL AND INSTALLATION - SOHC for MONTERO AND TRUCK

12Nm g )f~~bs~

19Nm 14 ft.lbs. 30 Nm 22 c.lbs.

18

11 Nm 8 ftlbs. 8Nm - 476lklbs. d

Removal steps 1. Injector and fuel rail 2. Insulator eG4 3. Fuel pressure regulator 4. O-ring 5. Insulator )F4 6. Injectors 7. O-ring 8. Gromet 9. Fuel rail 10. Water hose A Il. Water hose B 1 TSB Revision

12. Heat pipe 13. Heat pipe gasket 14. Water hose eD4 15. Engine coolant temperature gauge unit eC4 16. Engine coolant temperature sensor eB4 17. Therm0 switch 18. Water outlet fitting 19. Water outlet fitting gasket 20. Thermostat 21. Intake manifold 22. Intake manifold gasket

7EN0500

11 E-64

6G7 ENGINE - Intake Manifold and Fuel Parts

{EMOVAL AND INSTALLATION - DOHC

IY Nrn ldft Ihe

11 Nm 8 ftlbs.

19 Nm 14 ft.lbs.

19 Nm 14 ft.lbs.

-3 18 Nm 13 ft.lbs. --$j

Removal steps

1. Injector harness 2. Injector and fuel rail 3. Insulator +G4 4. Fuel pressure regulator 5. O-ring 6. Insulator 7. Injector clip eF4 8. Injectors 9. O-ring 10. Gromet 11. Fuel pipe 12. O-ring 13. Fuel rail *E4 14. Intake manifold TSB

15. Intake manifold gasket I)Dg 16. Engine coolant temperature gauge unit eC4 17. Engine coolant temperature sensor +B4 18. Therm0 switch 19. Water hose 20. Water hose A 21. Water outlet fitting - 3000GT 22. Water outlet fitting- DIAMAN TE 23. Water outlet fitting gasket 24. Water inlet fitting #A4 25. Thermostat 26. Thermostat housing 27. Thermostat housing gasket Revision

7EN0501

667 ENGINE - Intake Manifold and Fuel Parts INSPECTION INJECTORS (1) Measure the resistance between the terminals of the injectors using a circuit tester. If the resistance is out of?he specification, replace the injector. Standard value: 13 - 16 R at 20°C (68°F) Non Turbo 2 - 3 IR at 20°C (68°F) Turbo 6FU192C I

Alignment mark \

Jiggle valve

INSTALLATION SERVICE POINTS +A4 THERMOSTAT INSTALLATION - DOHC (1) install the thermostat and line up the jiggle valve with the alignment mark on the thermostat housing.

II

II

7COOO42

I)B4

Sealant

SEALANT APPLICATION TO THERM0 SWITCH

Specified sealant: 3M Part No. 8660 or equivalent

1 EN0338

+c+ SEALANT APPLICATION TO ENGINE COOLANT TEMPERATURE SENSOR

Sealant

Specified sealant: 3M Nut Locking No. 4171 or equivalent

9cooo91

Sealant

eD4 SEALANT APPLICATION TO ENGINE COOLANT TEMPERATURE GAUGE UNIT Specified sealant: 3M Part No. 8660 or equivalent

IIE-66

6G7 ENGINE - Intake Manifold and Fuel Parts r)E4

_ Front

INTAKE MANIFOLD INSTALLATION - DOHC

(1) Tighten the nuts on the right bank to 4 Nm (2.2 ft.lbs.). (2) Tighten the nuts on the left bank to the specified torque. Then tighten the nuts on right bank to the specified torque. (3) Tighten the nuts on the left bank and those on the right bbnk again in that order.

71 NO090

I)Fg INSTALLATION OF INJECTOR (1) Before installing the injector, the rubber O-ring must be lubricated with a drop of clean engine oil for easy installation.

7FUO61'

(2) Insert the injector top end into the fuel rail. Be careful not to damage O-ring during installation. (3) Install the injector clip by sliding the open ends onto both injector and fuel rail.

I)G4

FUEL PRESSURE REGULATOR INSTALLATION (1) Before installing the pressure regulator, the O-ring must be lubricated with a drop of clean engine oil for easy installation.

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yfip@7

667 ENGINE - Exhaust Manifold

EXHAUST MANIFOLD REMOVAL AND INSTALLATION - SOHC for DIAMANTE 14 Nm IOfLlbs.

-I’” /(/

1

m

6 III

24 Nm l7 ft-‘?m

5--K-a

14 Nm IO ft.lbs.

&

&-

, 6.4

14

D @---1SNm 14 ft.lbs.

Removal steps 1. Oil level gauge 2. Oil level gauge guide 3. O-ring 4. Heat protector 5. Engine hanger, right 6. Exhaust manifold, right )BC 7. Exhaust manifold gasket 8. Heat protector, right 9. Bracket 10. Exhaust manifold, left +B4 11. Exhaust manifold gasket 12. Water hose 13. Water hose 14. Water by-pass hose

+A4 15. Water inlet pipe B +A4 16. O-ring )A4 17. Water inlet pipe A *A4 18. Water inlet pipe *A4 19. O-ring 20. Water pump 21. Water pump gasket

For A/T

7EN0502 I

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For M/l

6G7 ENGINE - Exhaust Manifold IEMOVAL AND INSTALLATION - SOHC for MONTERO AND TRUCK

19 Nm

6

I

-

I/‘,“/

I

18

12Nm 9 ft.lbs.

Removal steps 1. Oil level gauge 2. Oil level gauge guide 3. O-ring 4. Heat protector, right 5. Engine hanger 6. Exhaust manifold, right eB4 7. Exhaust manifold gasket 8. Heat protector, left 9. Bracket 10. Exhaust manifold, left $B4 11. Exhaust manifold gasket 12. Water hose 13. Water hose A 14. Heater pipe 15. Heater pipe gasket 16. Water pipe +A4 17. O-ring *A4 18. Water inlet pipe 19. Water inlet fitting gasket 20. Water pump 21. Water pump gasket

14 Nm 10 ft.lbs.

7ENO360

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c

667 ENGINE - Exhaust Manifold

IEMOVAL AND INSTALLATION - DOHC NON-TURBO

9

12

14 10 1 ft.lbs. Nm

14 Nm 10 ft.lbs.

9 11m 13 Nm 9 ft.lbs. 14 Nm IO ftlbs.

45 Nm 33 ft.lbs.

Removal steps 1. Oil level gauge 2. Oil level gauge guide 3. O-ring 4. Heat protector, right 5. Engine hanger 6. Exhaust manifold, right 7. Exhaust manifold gasket 8. Heat protector, left 9. Exhaust manifold, left 0. Exhaust manifold gasket 1. O-ring 2. Water inlet pipe 3. O-ring 4. Water pump 15. Water pump gasket 7EN0503

IIE-70

667 ENGINE - Exhaust Manifold

REMOVAL AND INSTALLATION - DOHC TURBO

14 Nm 10 ftlbs. -

17 ftlbs.

Removal steps 1. Oil level gauge 2. Oil level gauge guide 3. O-ring *A4 4. O-ring +A4 5. Water inlet pipe #A4 6. O-ring 7. Water pump 8. Water pump gasket 7EN0504

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TIE-71

6G7 ENGINE - Exhaust Manifold 60 Nm 44 ft.lbs.

14Nm __B IO ft.lbs.

31 Nm 22 ft Ibs.

“Nm klbs.

14 Nm 10 ftlbs.

60 Nm 43 ftlbs.

a

9. Heat protector B 10. Heat protector A 11. Turbocharger stay 12. Exhaust fitting 13. Exhaust fitting gasket 14. Oil pipe 15. Water pipe A, right 16. Water hose 17. Water pipe B, right 18. Water hose

19. Turbocharger, right 20. Turbocharger gasket 21. Ring 22. Oil return pipe, right 23. Oil return pipe gasket 24. Exhaust manifold sta , right +C4 25. Exhaust manifold, rig):t 26. Exhaust manifold gasket

71N0120

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6G7 ENGINE - Exhaust Manifold

11 E-72

4 %4%

35 IlNm 8 klbs. 25 Nm 18 ft.lbs. -9 ---ml

V

31 Nm 22 ftlbs. /

14 Nm IO ftlbs.

m

10 Nm

28

14Nm & IO ft.lbs. 27

3im

27. Heat protector D 28. Exhaust fitting, left 29. Exhaust fitting gasket, left 30. Heat protector C 31. Oil return pipe 32. Oil return pipe gasket 33. Oil pipe 34. Water pipe 6, left 35. Water hose 7lN0121

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i

6G7 ENGINE - Exhaust Manifold I

O-ring I

Water pump

I

WE-73

INSTALLATION SERVICE POINTS +A4 O-RING AND WATER PIPE INSTALLATION (I) Wet the O-ring (with water) to facilitate assembly. Caution Keep the O-ring free of oil or grease.

Water in’let pipe

6EN0594 I

I)B4

EXHAUST MANIFOLD GASKET IDENTIFICATION SOHC (1) Install gaskets with cylinder number 0, @ and @ embossed on their top side to the right bank and install those with cylinder number 0, @ and @J to the left bank.

Cylinder No.

For right bank Front c3

7lNOOlCI

Front e

For left bank Cylinder No.

7FNWi11

E

I)c4 RIGHT EXHAUST MANIFOLD INSTALLATION DOHC TURBO Tighten the nuts in the following order. (1) Tighten five nuts @ to 30 Nm (22 ftlbs.). (2) Tighten nuts @ to 50 Nm (36 ft.lbs.). (3) Back off nuts @I until a torque value of 10 Nm (7 ft.lbs.) is achieved. (4) Tighten nuts @ to 30 Nm (22 ft.lbs.). NOTE (1) Fit the cone disc spring with the grooved side facing the nut. (2) Install the nut, cone disc spring and washer in the order shown in the illustration.

Groove 7lNOl l!

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6G7 ENGINE - Exhaust Manifold

11 E-74

I)D4

LEFT EXHAUST MANIFOLD INSTALLATION - DOHC TURBO

Tighten the nuts in the following order. (1) Tighten four nuts @ to 30 Nm (22 ft.lbs.). (2) -TT;.poranly tighten the turbocharger to the exhaust man-

I

Groove

(3) Tighten nut @ to 30 Nm (22 ft.lbs.). (4) Tighten nuts @ and @ to 50 Nm (36 ftlbs.). (5) Back off nuts @ and @ until a torque value of 10 Nm (7 ft.lbs.) is achieved. (6) Tighten nuts @ and @ to 30 Nm (22 ftlbs.). NOTE (1) Fit the cone disc spring with the grooved side facing the nut. (2) Install the nut, cone disc spring and washer in the order shown in the illustration.

/

7lNOll

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6G7 ENGINE - Turbocharger

TURBOCHARGER DISASSEMBLY AND REASSEMBLY

Xsassembly steps

eD4

*C4 *Bg bAC r

1

1. Snap pin 2. Turbocharger waste gate actuator 3. Coupling 4. Turbine housing 5. Snap ring 6. Turbine wheel assembly 7. 0-rina 8. Combressor cover 71N0098

INSPECTION TURBOCHARGER (1) Manually open and close the waste gate valve to make sure it operates freely. (2) Inspect the oil passage in the cartridge for signs of deposits or blockage. (3) Clean the inlet section of the compressor cover with a rag. Inspect it for signs of contact with the compressor turbine. If worn, replace it.

REASSEMBLY SERVICE POINTS #A4 O-RING INSTALLATION (1) Apply a light coat of engine oil to a new O-ring and fit it in the groove of the turbine wheel assembly. O-ring

3EN019C

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I

11 E-76

6G7 ENGINE - Turbocharger 664 TURBINE WHEEL ASSEMBLY INSTALLATION ) Install the turbine wheel assembly to the compressor cover while aligning the dowel pin and the hole. Caution Use care not to damage the blades of the turbine wheel and compressor wheel.

il

Chamfered

+cg SNAP RING INSTALLATION (1) Fit the snap ring with its chamfered side facing up.

T&ink wheel assembly I CompressoB cover

I)04 TURBINE HOUSING INSTALLATION (1) Install the turbine housing while aligning the dowel pin and the hole. Caution Use care not to damage the blades of the turbine wheel.

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“14 E~77

667 ENGINE - Rocker Arms and Camshaft - SOHC

ROCKER ARMS ANI) CAMSHAFTS - SOHC REMOVAL AND INSTALLATION - DIAMANTE

9Nm 7 ft.lbs.9 @

7 30 7

Removal steps

#E4 ;. Fi;,c:;; cover

elII4 3. Circular packing +C4 4. Camshaft oil seal 5. Distributor adaptor 6. O-ring #B4 7. Rocker arms, shafts and bebring caps OAO +A4 98: pa,Smhs;W$er

7EN0362

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IIE-78

6G7 ENGINE - Rocker Arms and Camshaft - SOHC

REMOVAL AND INSTALLATION - MONTERO AND TRUCK

9Nm Q- 7 ft.lbs. 9Nm 7 ft.lbs. I

-

-

0 8

13Nm 9 ft.lbs. ------d

t

Removal steps 1 Oil filler 2. Oil filler tube eE4 3. Rocker cover 4. Gasket #D4 5. Circular packing I)C4 6. Camshaft oil seal 7. Distributor adaptor 8. O-ring ’ #B4 9. Rocker arms, shafts and bearing caps aA0 *A4 ; 7: p&dfutster

7EN0363

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6G7 ENGINE - Rocker Arms and Camshaft - SOHC

1 TE39

REMOVAL SERVICE POINT flo

ROCKER ARM, SHAFT AND BEARING CAP REMOVAL (1) Install the special tools to the rocker arm to hold the lash adjuster. (2) Loosen the camshaft bearing cap bolt. Do not remove the bolts from the cap. (3) Remove the rocker arm, shaft and bearing cap as an assembly.

INSPECTION CAMSHAFT (1) Inspect the camshaft bearing journals for damage and binding. If the journals are binding, also check the cylinder head for damage. Also check the cylinder head oil holes for clogging. (2) Check the tooth surface of the distributor drive gear teeth of the camshaft and replace if abnormal wear is evident. (3) Check the cam surface for abnormal wear and damage and replace if defective. Also measure the cam height and replace if out of limit. Standard value: 41.25 mm (1.6240 in.) Limit: 40.75 mm (1.6643 in.)

LASH ADJUSTER LEAK DOWN TEST Caution 1. The lash adjuster is a precision part. Keep it free from dust and other foreign matters. 2. Do not disassemble the lash adjusters. 3. When cleaning the lash adjusters, use clean diesel fuel only.

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11 E-80

667 ENGINE - Rocker Arms and Camshaft - SOHC (1) Immerse the lash adjuster in clean diesel fuel. (2) While lightly pushing down the inner steel ball using the small wire, move the plunger up and down four or five times to bleed air. Use of the Retainer facilitates the air bleeding of the rocker arm mounted type lash adjuster. (3) Remove the small wire and press the plunger. If the plunger is hard to be pushed in, the lash adjuster is normal. If the plunger can be pushed in all the way readily, bleed the lash adjuster again and test again. If the plunger is still loose, replace the lash adjuster. Caution Upon completion of air bleeding, hold the lash adjuster upright to prevents the inside diesel fuel from spilling.

6EN057

Division = 1 mm (.04

(4) After air bleeding, set the lash adjuster on the special tool (Leak down tester MD998440). (5) After the plunger has gone down somewhat 0.2 - 0.5 mm (.008 - .020 in.), measure the time taken for it to go down 1 mm (.04 in.). Replace if the measured time is out of specification. Standard value: 4 - 20 seconds / 1 mm (.04 in.) [Diesel fuel at 15 - 20°C (50 - 68”F)]

in.)

I

7EN043t

3

INSTALLATION SERVICE POINTS *A4 LASH ADJUSTER INSTALLATION (1) Immerse the lash adjuster in clean diesel fuel. (2) Using a small wire, move the plunger up and down 4 or 5 times while pushing down lightly on the check ball in order to bleed out the air.

6EN0421

M D998443-0 1

Lash adjust&

7EN0174

1

(3) Insert the lash adjuster to rocker arm, being careful not to spill the diesel fuel. Then use the special tool to prevent the adjuster from falling while installing it.

!I

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‘I

667 ENGINE - Rocker Arms and Camshaft - SOHC +64

ROCKER ARM, SHAFT AND BEARING CAP INSTALLATION (1) Apply a minimum amount of the specified sealant on the four places of the cylinder head. NOTE Be sure the sealing agent does not swell out onto the cam journal surface of the cylinder head. If it swells out, immediately wipe it off before it can dry.

Specified sealant: 3M NUT Locking No. 4171 or equivalent

Apply sealant Apply sealant * No. 1 and No.4 bearing cap mating surface of cylinder head

(2) Install the rocker arms, shafts and bearing caps such that the arrow mark on the bearing cap faces in the same direction as the arrow mark on the cylinder head.

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11 E-82

667 ENGINE - Rocker Arms and Camshaft - SOHC

Arrow mark (bearing cap)

Rocker arm shaft assembly(B)

c7

Arrow mark (cylinder head)

Timing belt side

Rocker arm shaft ----assembly (A)

Arrow mark-(bearing cap)

7EN0176

(3) Tighten the bearing cap bolts to the specified torque. (4) Remove the special tools from all rocker arms.

ec4 CAMSHAFT OIL SEAL INSTALLATION (1) Apply a slight amount of engine oil all over the circumference of the camshaft oil seal lip. (2) Using the special tool, insert the oil seal.

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I

667 ENGINE - Rocker Arms and Camshaft - SOHC #D4 C I R C U L A R P A C K I N G I N S T A L L A T I O N (1) Install a 1.3 to 1.5 mm (.052 to .059 in.) thick spacer to the special tool and drive in the circular packing. NOTE Use of MD724328 spacer for transmission is recommended.

MD998714-01

/

\\/

7EN0441

\/

Caution The packing is overdriven if no spacer is fitted to the special tool.

0.5 mm (020 in.) Spacer 7 I -

/

MD998714-01

-

I 7EN0131

I)E4 ROCKER COVER INSTALLATION (1) Apply specified sealant on the area specified in the illustration. Specified sealant: 3M ATD Part No. 6660 or equivalent

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IIE-84

6G7 ENGINE - Rocker Arms and Rocker Shafts - SOHC

DISASSEMBLY AND REASSEMBLY

Disassembly steps 1. Bearing cap No.4 0 2. Rocker arm 3. Spring 4. Bearing cap No. 3 5. Bearing cap No. 2 *A4 6. Rocker arm shaft “B” $A4 7. Rocker arm shaft “A” 8. Bearing cap No. 1

DISASSEMBLY SERVICE POINT OAo ROCKER ARM REMOVAL (1) Before disassembly, identify the original location of each rocker arm by a symbol. For example, put symbols as shown below. 1 IN: For No.1 cylinder intake 6EX: For No.6 cylinder exhaust

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__

667 ENGINE - Rocker Arms and Rocker Shafts - SOHC INSPECTION ROCKER ARM (1) Check the roller surface and replace the rocker arm if recesses, damage or heat seizure is observed. (2) Check roller rotation and replace the rocker arm if uneven rotation or roller backlash is observed. (3) Check the inside diameter and replace the rocker arm if damage or seizure is observed. 7EN006r

ROCKER ARM SHAFT (1) Check the rocker arm mounting portions of the rocker arm shafts for wear or damage. Replace as necessary. (2) Check to ensure that the oil holes are clear.

Notch

Rocker arm shaft “6”

REASSEMBLY SERVICE POINT

#A4

Rocker arm shaft “A”

Cap No. Jiew P

\

P

ROCKER ARM SHAFT INSTALLATION (1) Install the rocker arm shafts “A” and “B” to the camshaft bearing cap No.1 and insert the bolts into the holes of the bearing cap and shafts. (2) Install the rocker arm shafts with the notched side facing the bearing cap No.1 and the oil grooved side facing downward. The shaft with a smaller oil hole is the rocker arm shaft “A”.

7EN0015

Rocker arm Oil hole shaft (A) \ ----/ ‘ao’& -,----

Rocker arm shaft (B)

7ENOOlE

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IIE-88

6G7 ENGINE

- Camshafts, Rocker Arms and Bearing Caps - DOHC

INSPECTION CAMSHAFT Measure the cam height (longer diameter of the cam). If it exceeds the limit, replace the camshaft. Standard value: Up to 1992 models 35.49 mm (1.3972 in.) Intake side 35.20 mm (1.3858 in.) Exhaust side From 1993 models 34.91 mm (1.3744 in.) Intake side 34.91 mm (1.3744 in.) Exhaust side Limit: Up to 1992 models 34.99 mm (1.3778 in.) Intake side 34.70 mm (1.3661 in.) Exhaust side From 1993 models 34.41 mm (1.3547 in.) Intake side 34.41 mm (1.3547 in.) Exhaust side

MD998440

n

Scale = 1 mm l.039 in.) I

\

LASH ADJUSTER LEAK DOWN TEST Refer to “LASH ADJUSTER LEAK DOWN TEST” on pages 11 E-79 and 11 E-80. Also note the following: When the lash adjuster is set on a tester, remove the adjusting screw of the tester and adjust it to the height of the lash adjuster as shown in the illustration.

6EN035:

INSTALLATION SERVICE POINTS I)A4 LASH ADJUSTER INSTALLATION Small wire

(1) Immerse the lash adjuster in clean diesel fuel. (2) Using a small wire, move the plunger up and down 4 or 5 times while lightly pushing down the check ball in order to bleed out the air. (3) Install the lash adjuster to the cylinder head.

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6G7 ENGINE

- Camshafts, Rocker Arms and Bearing Caps - DOHC

Identification mark

7EN024S

Right bank

KY

17E439

+64 C A M S H A F T INSTALLATlON (1) Turn the crankshaft to bring No.1 cylinder to the top dead center. (2) Check that the rocker arm is installed correctly on the lash adjuster and valve. (3) Install the camshaft while noting the identification mark (stamped on the hexagon section). Identification mark: Up to 1992 From 1993 models mpdeis Turbo Intake side J E Exhaust side Non-turbo Intake side J” Exhaust side ii K (4) Install the camshafts with their dowel pins positioned as shown in the illustration.

Left bank

ApproFi

ec4 BEARING CAP INSTALLATION (1) Install the bearing caps according to the identification mark and cap number. No.2, 3 and 4 bearing caps bear the front mark. Install these caps with the front mark directed in the same direction as that on the cylinder head. I Identification mark: Intake side Exhaust side E Front mark

Identification 7EN031 t

(2) Gradually tighten the bearing caps in two or three steps. In the final step, tighten to the specified torque.

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IIE-88

6G7 ENGINE

- Camshafts, Rocker Arms and Bearing Caps - DOHC

INSPECTION CAMSHAFT Measure the cam height (longer diameter of the cam). If it exceeds the limit, replace the camshaft. Standard value: Up to 1992 models 35.49 mm (1.3972 in.) Intake side 35.20 mm (1.3858 in.) Exhaust side From 1993 models 34.91 mm (1.3744 in.) Intake side 34.91 mm (1.3744 in.) Exhaust side Limit: Up to 1992 models 34.99 mm (1.3778 in.) Intake side 34.70 mm (1.3661 in.) Exhaust side From 1993 models 34.41 mm (1.3547 in.) Intake side 34.41 mm (1.3547 in.) Exhaust side

MD998440

n

Scale = 1 mm l.039 in.) I

\

LASH ADJUSTER LEAK DOWN TEST Refer to “LASH ADJUSTER LEAK DOWN TEST” on pages 11 E-79 and 11 E-80. Also note the following: When the lash adjuster is set on a tester, remove the adjusting screw of the tester and adjust it to the height of the lash adjuster as shown in the illustration.

6EN035:

INSTALLATION SERVICE POINTS I)A4 LASH ADJUSTER INSTALLATION Small wire

(1) Immerse the lash adjuster in clean diesel fuel. (2) Using a small wire, move the plunger up and down 4 or 5 times while lightly pushing down the check ball in order to bleed out the air. (3) Install the lash adjuster to the cylinder head.

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6G7 ENGINE

- Camshafts, Rocker Arms and Bearing Caps - DOHC

Identification mark

7EN024S

Right bank

KY

17E439

+64 C A M S H A F T INSTALLATlON (1) Turn the crankshaft to bring No.1 cylinder to the top dead center. (2) Check that the rocker arm is installed correctly on the lash adjuster and valve. (3) Install the camshaft while noting the identification mark (stamped on the hexagon section). Identification mark: Up to 1992 From 1993 models mpdeis Turbo Intake side J E Exhaust side Non-turbo Intake side J” Exhaust side ii K (4) Install the camshafts with their dowel pins positioned as shown in the illustration.

Left bank

ApproFi

ec4 BEARING CAP INSTALLATION (1) Install the bearing caps according to the identification mark and cap number. No.2, 3 and 4 bearing caps bear the front mark. Install these caps with the front mark directed in the same direction as that on the cylinder head. I Identification mark: Intake side Exhaust side E Front mark

Identification 7EN031 t

(2) Gradually tighten the bearing caps in two or three steps. In the final step, tighten to the specified torque.

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IIE-90

6G7 ENGINE - c amshafts, I)D4

Rocker Arms and Bearing Caps - DOHC CAMSHAFT OIL SEAL

(1) Apply engine oil sparingly all around the lip of the camshaft oil seal. (2) Using the special tool, install the oil seal.

+E4

CIRCULAR PACKING

(1) Install the circular packing with the special tool.

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l-l E-91

6G7 ENGINE - Cylinder Head and Valve - SOHC

CYLINDER HEAD AND VALVE - SOHC REMOVAL AND INSTALLATION 0+5 W6 ce-130 g -0Q 10 -4

7 @E---14

b- 170

Removal steps QAIJ +E4 12. fyks$~; head bolt 3: Cylinder head assembly #D4 4. Cylinder head gasket ~BI) eC4 5. Retainer lock 6. Valve spring retainer #B4 7. Valve spring 8. Inlet valve ~BI) $C4 9. Retainer lock 10. Valve spring retainer

IlONm 80 ft.lbs. \

1. Valve spring 2. Exhaust valve 3. Valve stem seal 4. Valve spring seat 5. Valve stem seal 6. Valve spring seat 7. Inlet valve guide 3. Snap ring 3. Exhaust valve guide I. Inlet valve seat I. Exhaust valve seat 2. Cylinder head

:

7EN0522

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11 E-92

6G7 ENGINE - Cylinder Head and Valve - SOHC REMOVAL SERVICE POINTS PRECAUTION FOR REMOVED PARTS (1) Keep removed parts in order according to the cylinder number and intake/exhaust.

OAo CYLINDER HEAD BOLT REMOVAL (1) Using the special tool, loosen the cylinder head bolts. Loosen evenly, little by little.

~BI) RETAINER LOCK REMOVAL (1) Using the special tool, compress the spring. (2) Remove the retainer locks.

@o VALVE STEM SEAL REMOVAL (I) Do not reuse removed valve stem seals.

7FNflM4

1

I

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Revision

I

6G7 ENGINE - Cylinder Head and Valve - SOHC INSPECTION CYLINDER HEAD (1) Check the cylinder head gasket surface for flatness by using a straightedge in the directions of A through G shown in the illustration. Standard value: 0.05 mm (.0020 in.) Limit: 0.2 mm (.008 in.) (2) If the service limit is exceeded, correct to meet the specification. Grinding limit: “0.2 mm (.008 in.) * Total resurfacing depth of both cylinder head and cylinder block. Overall height: 84 mm (3.31 in.)

VALVE (1) If the valve stem is worn (ridge wear) or otherwise damaged, replace. Also replace the valve if the stem end (that contacts the rocker arm adjusting screw) has a dent.

Ridge wear 1 EN026:

(2) Check the valve face for correct contact. If incorrect, reface using a valve refacer. Valve should make a uniform contact with the seat at the center of valve face. (3) If the margin exceeds the service limit, replace the valve. Standard value: 1.2 Intake 2.0 Exhaust Limit: Intake 0.7 1.5 Exhaust 6ENOW

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mm (.047 in.) mm (.079 in.) mm (.028 in.) mm (.059 in.)

11 E-94

6G7 ENGINE - Cvlinder Head and Valve - SOHC

1 EN0264

VALVE SPRINGS (1 ) Measure the free height of the spring and, if it is smaller than the limit, replace. Standard value: SOHC 49.8 mm (1.961 in.) DOHC up to 1992 models 45.2 mm (1.780 in.) From 1993 models 46.4 mm (1.827 in.) Limit: SOHC 48.8 mm (1.921 in.) DOHC up to 1992 models 44.2 mm (1.740 in.) From 1993 models 45.4 mm (1.878 in.) (2) Measure the squareness of the spring and, if the limit is exceeded, replace. Standard value: 2” Limit: 4”

1 EN027:

VALVE GUIDES (1) Measure the clearance between the valve guide and valve stem. If the limit is exceeded, replace the valve guide or valve, or both. Standard value: 0.03 - 0.06 mm (.0012 - .0024 in.) Intake 0.05 - 0.09 mm (.0020 - .0035 in.) Exhaust Limit 0.10 mm (.0039 in.) Intake 0.15 mm (.0059 in.) Exhaust VALVE SEAT RECONDITIONING PROCEDURES (1) Before valve seat reconditioning, check the valve stem-toguide clearance. (2) Recondition the valve seat with a seat grinder or cutter. The valve seat width should be the specified value at the center of the valve face. Inspect the valve seat with prussian blue to determine where the valve contacts the seat. To do this, coat the valve

6EN0491

seat lightly with prussian blue, and then set the valve in place. Rotate the valve with a light pressure. If the blue is transferred to the center of the valve face, contact is satisfactory. If the blue is transferred to the top edge of the valve face, lower the valve seat with a 30 degrees stone or cutter. If the blue is transferred to the bottom edge of the valve face, raise the valve seat with a 65 degrees stone or cutter. Valve seat diameter: Intake 44 mm (1.73 in.) 38 mm (1.50 in.) Exhaust Seat width: 0.9 - 1.3 mm (.035 - .051 in.) (3) The valve and valve seat should be lapped with lapping compound.

1 TSB Revision

6G7 ENGINE - Cylinder Head and Valve - SOHC

1

Installed height

I

(4) Check the valve seat sinkage. The valve seat sinkage can be determined by measuring the valve spring’s installed height. (If the valve seat sinkage is great, the valve seat’s installed height also is great.) If the valve spring’s installed height exceeds the service limit, replace the insert with an oversize part as described below. Installed height of spring (both intake and exhaust) Standard value: 40.4 mm (1.591 in.) Limit: 41.4 mm (1.630 in.)

6EN043:

VALVE SEAT REPLACEMENT PROCEDURE (1) Cut the valve seat to be replaced from the inside to thin the wall thickness. Then, remove the valve seat.

0.5- 1 mm LO20 - .039 in.)

0.5- 1 mm (.020 - ,039 in.) I,

1 EN0274

I

1 EN027E

Installation

Removal a Press

0 Press

Valve guide 6EN054:

(2) Rebore the valve seat hole in the cylinder head to a selected oversize valve seat diameter. Intake valve seat hole diameter 0.30 O.S.: 44.30 - 44.33 mm (1.7441 - 1.7453 in.) 0.60 O.S.: 44.66 - 44.63 mm (1.7559 - 1.7571 in.) Exhaust valve seat hole diameter 0.30 O.S.: 38.30 - 38.33 mm (1.5079 - 1.5091 in.) 0.60 O.S.: 38.60 - 38.63 mm (1.5197 - 1.5209 in.) (3) Before fitting the valve seat, either heat the cylinder head up to approximately 250°C (482°F) or cool the valve seat in liquid nitrogen, to prevent the cylinder head bore from galling. (4) Using a valve seat cutter, correct the valve seat to the specified width and angle. See “VALVE SEAT RECONDITIONING PROCEDU’RE”.

VALVE GUIDE REPLACEMENT PROCEDURE (1) Remove the snap ring from the exhaust valve; guide. (2) Using the push rod and a press, remove the valve guide toward the cylinder head gasket surface. (3) Rebore the valve guide hole to the new oversize valve guide outside diameter. Valve guide hole diameter 0.05 O.S.: 13.05 - 13.07 mm (.5138 - .5’1;45 in.) 0.25 OS.: 13.25 - 13.27 mm (.5217 - .5224 in.) 0.50 O.S.: 13.50 - 13.52 mm (.5315 - .5322 in.)

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11 E-96

6G7 ENGINE - Cylinder Head and Valve - SOHC NOTE Do not install a valve guide of the same size again. (4) Using the special tool, press-fit the valve guide, working from the cylinder head top surface. (5) After installing valve guides, insert new valves in them to check for sliding condition. (6) When valve guides have been replaced, check for valve contact and correct the valve seats as necessary.

INSTALLATION SERVICE POINTS I)A4 VALVE STEM SEAL INSTALLATION MD998729-01

(1) Install the valve spring seat. (2) Using the special tool, install a new stem seal to the valve guide. Caution Do not reuse removed valve stem seals.

7EN0081

I)64 VALVE SPRING INSTALLATION (1) Direct the valve spring end with identification color toward the spring retainer.

6EN0544i

#c4 RETAINER LOCK INSTALLATION (1) Using the special tool, compress the valve spring and insert the retainer lock into position.

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6G7 ENGINE - Cylinder Head and Valve - SOHC

Identification mark

+D4 CYLINDER HEAD GASKET IDENTIFlCATl6N’ Caution Do not apply sealant to the cylinder head gasket. Identification mark: DIAMANTE a n d M O N T E R O 7 2 72W TRUCK

#E4 CYLINDER HEAD BOLT INSTALLATION

MD998051-01

(1) Tighten the cylinder head bolts in the sequence shown. Each bolt should be tightened in two to three steps, torquing progressively. Tighten to the specified torque in the final sequence.

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IIE-98

6G7 ENGINE - Cvlinder Head and Valves - DOHC

CYLINDER HEAD AND VALVES - DOHC REMOVAL OF INSTALLATION

Non-turbo IlONm 80 ft.lbs. Turbo 125 Nm-+ Back off .+ lg\yE . . 90 ft.lbs.

Removal steps I, Cylinder head bolt 2. Washer 3. Cylinder head assembly 4. Cylinder head gasket 5. Retainer lock 6. Valve spring retainer 7. Valve spring 8. Intake valve 9. Retainer lock 1 0. Valve spring retainer

eB4 11. Valve spring 12. Exhaust valve QCr$ *A4 13. Valve stem seal 14. Valve spring seat (Gr) +A4 15. Valve stem seal 16. Valve spring seat 17. Intake valve guide 18. Exhaust valve guide 19. Intake valve seat 20. Exhaust valve seat 21. Cylinder head 7EN0254

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6G7 ENGINE - Cylinder Head and Valves - DOHC

qqp99

REMOVAL SERVICE POINTS gA0 CYLINDER HEAD BOLT REMOVAL (1) Using the special tool, loosen the cylinder head bolts. Loosen evenly, little by little.

(‘IBM RETAINER LOCK REMOVAL (1) Using the special tool, compress the spring. (2) Remove the retainer locks.

@I) VALVE STEM SEAL REMOVAL (1) Do not reuse removed stem seals.

INSPECTION For inspection, only variations from the SOHC engine are described below. (Refer to page 11 E-93, 94, 95 and 96)

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I

IIE-100

6G7 ENGINE - Cylinder Head and Valves - DOHC CYLINDER HEAD Cylinder head height (when new): 131.9 - 132.1 mm (5.193 - 5.201 in.)

252

INSTALLATION SERVICE POINTS I)A4 VALVE STEM SEAL INSTALLATION (1) Install the valve spring seat. (2) Using the special tool, install a new stem seal to the valve guide. Caution Do not reuse removed valve stem seal.

Valve seat

II

II

6EN0205

I)B4 VALVE SPRING INSTALLATION Spring retainer

Identification color

(1) Install the valve spring so that the end with identification color is positioned on the rocker arm end.

Stem seal

I

6EN05A4

+c4 INSTALLATION OF RETAINER LOCKS (1) Using the special tool, compress the valve spring and insert the retainer lock into position.

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6G7 ENGINE - Cylinder Head and Valves - DOHC

1 TE-‘MN

I)D4 CYLINDER HEAD GASKET IDENTIFICATION Identification mark 2DN Non-turbo Turbo 2DT

Identifi-

7EN026

I)E4 CYLINDER HEAD BOLT INSTALLATION (1) Tighten the bolts in two to three stages in the illustrated sequence. (2) Back off the bolts once and tighten them to the specified torque in the same procedure as shown in step (1).

3

Intake side

p-y-y-q

Exhaust side 7EN026:

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IIE-102

6G7 ENGINE

- Oil Pan and Oil Pump

OIL PAN AND OIL PUMP REMOVAL AND INSTALLATION - DIAMANTE and 3000GT 23 Nm 17 ft.lbs. 7

11 Nm

**

24 Nm 17 ftlbs.

1

~~ __

55 Nm 40 ft.lbs. )

75 Nm 54 ft.lbs. I

1,

14ft.lbs.

7 ft.lbs.

14 Nm 10 klbs.

UJ

33 ft.lbs. 40 Nm 29 ft.lbs.

Removal steps I, Transmission stay, right 2. Transmission stay, left eG4 3. Oil pressure switch #F4 4. Oil pressure gauge unit +E4 5. Oil filter 6. Oil cooler by-pass valve*** 7. Oil filter bracket stay 8. Oil filter bracket 9. Oil filter bracket gasket 10. Drain plug eO4 11. Drain plug gasket c)ArJ eC4 12. Oil pan 13. Oil screen 14. Oil screen gasket 15. Plug

6Nm 4 ft.lbs.

16. Relief spring 17. Relief plunger )Bg 18. Crankshaft oil seal 19. Oil pump case 20. Oil pump gasket 21. Oil pump cover ~BI) #A4 22. Oil pump outer rotor (IB~J #A4 23. Oil pump inner rotor NOTE *: SOHC **: DOHC ***: DOHC Turbo 7EN0422

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6G7 ENGINE - Oil Pan and Oil Pump

11!Emw3

{EMOVAL AND INSTALLATION - MONTERO and TRUCK Bolt with head mark “4” 24 Nm 17 ft.lbs. Bolt with head mark “7” 14 Nm 10 ft.lbs. 55 Nm

5

in& Ihc

10 Nm 7 ft.lbs. \ m

I< 55 Nm 40 ft.lbs.

I

14 Nm 11 ft.lbs.

10 Nm

7 ft.lbs.

19Nm 14 ft.lbs. \

I 45 Nm 33 ft.lbs. 40 Nm 29 ft.lbs. Removal steps #G4 1. Oil pressure switch #F4 2. Oil pressure gauge unit - MONTERO +E4 3. Oil filter 4. Oil cooler by-pass valve - MONTEBO 5. Oil filter bracket 6. Oil filter bracket gasket 7. Drain plug #III4 8. Drain plug gasket (IAI) eC4 9. Oil pan 10. Oil screen Il. Oil screen gasket 12. Plug 13. Relief spring 14. Relief plunger )B4 15. Crankshaft oil seal 16. Oil pump case 17. Oil pump gasket 18. Oil pump cover (IBI) )A4 19. Oil pump outer rotor @I) @A4 20. Oil pump Inner rotor TSB Revision

6 N’m 4 ft.lbs.

7EN0423

I

IIE-104

6G7 ENGINE - Oil Pan and Oil Pumn REMOVAL SERVICE POINT gA0 O I L P A N R E M O V A L (1) Knock the special tool deeply between the oil pan and the cylinder block. (2) Hitting the special tool on the side, slide it along the oil pan to remove it.

~BI)

OUTER ROTOR / INNER ROTOR REMOVAL

(1) Make alignment dots on the outer and inner rotors for reference in reassembly.

INSPECTION OIL PUMP

(1) Check the tip clearance. Standard value: 0.03 - 0.08 mm (.0012 - .0031 in.)

(2) Check the side clearance. Standard value: 0.04 - 0.10 mm (.0016 - .0039)

(3) Check the body clearance. Standard value: 0.10 - 0.18 mm (.0040 - .0070) Limit: 0.35 mm (.0138)

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6G7 ENGINE - Oil Pan and Oil Pump OIL COOLER BYPASS VALVE (1) Make sure that the valve moves smoothly. (2) Ensure that the dimension L measures the standard value under normal temperature and humidity. Dimension L: 34.5 mm (1.358 in.) (3) The dimension must be the standard value when measured after the valve has been dipped in 100°C (212°F) oil. Dimension L: 40 mm (1.57 in.) or more 6EN0589

INSTALLATION SERVICE POINTS #A$ INNER ROTOR / OUTER ROTOR INSTALLATION (1) Apply engine oil to the rotors. Then, install the rotors ensuring that the alignment dots made at disassembly are properly aligned.

I)B4

CRANKSHAFT FRONT OIL SEAL INSTALLATION (1) Using the special tool, knock the oil seal into the oil pump case. NOTE Knock it as far as it goes.

MD99871 7-01

Oil bump case

I

7FNOld

7EN046t

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IIE-106

6G7 ENGINE - Oil Pan and Oil Pump I)c4 OIL PAN INSTALLATION (1) Remove all the remaining gasket from the mating surfaces using a scraper or a wire brush. (2) Apply a 4 mm (.I6 in.) diameter bead of sealant to the oil pan flange. See “Form In-Place Gasket” in introduction. Specified sealant: Mitsubishi Genuine Part No. MD970389 or equivalent (3) The oil pan should be installed within 15 minutes after the application of sealant. (4) Tighten the flange bolts in the sequence shown in the illustration.

Bolt hole area

(=7 Timing belt side

Tightening sequence of flange bolts (bottom view)

a

Timing belt side

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6G7 ENGINE - Oil Pan and Oil Pump

1 ~@q’@!!

+04 DRAIN PLUG GASKET INSTALLATION (1) Install the drain plug gasket as illustrated.

I)E4 OIL FILTER INSTALLATION m l v$ket \

(1) Clean the installation surface of the filter bracket. (2) Apply engine oil to the O-ring of the oil filter. (3) Screw the oil filter on until the O-ring contacts the bracket. Then tighten 3/4 turn.

APPLY engine oil

6EN059 1

I)F4

SEALANT APPLICATION TO OIL PRESSURE GAUGE UNIT (1) Coat the threads of the gauge unit with sealant and install it using the special tool. Specified sealant: 3M ATD Part No.8660 or equivalent Caution 1. Keep the end of threaded portion clear of sealant. 2. Avoid an overtightening.

3EN022’ I

+G4

%AEA;T A P P L I C A T I O N T O O I L P R E S S U R E

(1) Coat the threads of the switch with sealant and install the switch using the special tool. Specified sealant: 3M ATD Part No.8660 or equivalent Caution 1. Keep the end of threaded portion clear of sealant. 2. Avoid an overtightening.

APP~

9EN009 4

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Revision

IIE-108

6G7 ENGINE - Piston and Connecting Rod

PISTON AND CONNECTING ROD REMOVAL AND INSTALLATION

!

4

52 Nm 38 ft.lbs.

Removal steps 1. Nut GAO #E4 2. Connecting rod cap 3. Connecting rod bearing (lower) eD4 4. Piston, connecting rod assembly 5. Connecting rod bearing (upper) 6. Piston rina No.? 7. Piston rini No.2 8. Oil ring 9. Piston pin 1 0. Piston 1 1. Connecting rod 1 2. Bolt 7EN0424

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6G7 ENGINE - Piston and Connecting Rod

llEJl69

REMOVAL SERVICE POINTS OAr) CONNECTING ROD CAP REMOVAL (1) Mark the cylinder numberdon the side of the connecting rod

big end for correct reassembly. (2) Keep the removed connecting rods, caps, and bearings in order according to the cylinder number..

7EN044E

1 Q2 e @J 3

Piston pin setting tool MIT21 6941

\ 3

d/

II cl

6O Q

7EN0426

Press pin

Piston pin

7ENO426 ITss

060 PISTON PIN REMOVAL Item No. Part No.

Description

1 2 3 4 5 6 7 8 9 10 11

Base Piston Support Connecting Rod Guide Connecting Rod Guide Connecting Rod Guide Piston Support Connecting Rod Guide Piston Support Press Pin Stop Screw Nut

MIT310134 MIT310136 MIT310137 MIT310138 MIT310139 MIT310140 MIT310141 MIT310142 MIT48143 216943 10396

Pin Pin Pin Pin

(1) Remove the stop screw from the base. .(2) Select the correct piston support for your application. (See above) Fit the piston support onto the base. Place the base on the press support blocks. (3) Insert the press pin through the piston pin hole. Select the correct connecting rod guide pin. (See above.) Thread the guide pin onto the threaded portion of the press pin. (4) Position the piston assembly on the piston support in the press. With the press pin up as shown in the illustration, insert the guide pin through the hole in the piston and through the hole in the piston support. (5) Press the piston pin out of the assembly. IMPORTANT: To avoid piston damage, l The piston support must seat squarely against the piston. 0 Verify that the piston pin will slide through the hole in the piston support. (6) Remove the piston pin from the piston pin.

IIE-110

6G7 ENGINE - Piston and Connecting Rod

INSPECTION PISTON (1) Replace the piston if scratches or seizure is evident on its surfaces (especially the thrust surface). Replace the piston if it is cracked. PISTON PIN (1) Insert the piston pin into the piston pin hole with a thumb. You should feel a slight resistance. Replace the piston pin if it can be easily inserted or there is an excessive play. (2) The piston and piston pin must be replaced as an assembly.

\r/

5EN0066

Push in by piston

PISTON RING (1) Check the piston ring for damage, excessive wear, and breakage and replace if defects are evident. If the piston has been replaced with a new one, the piston rings must also be replaced with new ones. (2) Check for clearance between the piston ring and ring groove. If the limit is exceeded, replace the ring or piston, or both. Standard value: No. 1 DIAMANTE and 3000GT 0.03 - 0.07 m m (.0012 - .0026 in.) MONTERO and TRUCK 0.05 - 0.09 mm (.0020 - .0035 in.) No. 2 0.02 - 0.06 m m (.OOOS - .0024 in.) Limit: 0.1 mm (.004 in.)

(3) Insert the piston ring into the cylinder bore. Force the ring down with a piston, the piston crown being in contact with the ring, to correctly position it at right angles to the cylinder wall. Then, measure the end gap with a feeler gauge. If the ring gap is excessive, replace the piston ring. Standard value: No. 1 0.30 - 0.45 m m (.0118 - .0177 in.) No. 2

Piston ring’

DIAMANTE and 3000GT

ring gap

0.45 - 0.60 m m (.0177 - .0236 in.)

MONTERO and TRUCK 0.25 - 0.45 m m (.0098 - .0177 in.)

Oil DIAMANTE and 3000GT 0.20 - 0.60 m m (.0079 - .0236 in.)

MONTERO and TRUCK 0.20 - 0.70 (.0079 - .0276 in.) Limit: 0.8 mm (.031 in.) No. 1, No. 2 Oil 1.0 mm (.039 in.)

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I

6G7 ENGINE - Piston and Connecting Rod CRANKSHAFT PIN OIL CLEARANCE (PLASTIC GAUGE METHOD) The crankshaft oil clearance can be measured easily by using a plastic gauge, as follows: (1) Remove oil and grease and any other foreign matters from the crankshaft pin and the bearing inner surface. (2) Install the crankshaft. (3) Cut the plastic gauge to the same length as the width of the bearing and place it on the pin in parallel with its axis.

(4) Gently place the crankshaft bearing cap over it and tighten the bolts to the specified torque. (5) Remove the bolts and gently remove the crankshaft bearing cap. (6) Measure the width of the smashed plastic gauge at its widest section by using a scale printed on the plastic gauge bag. Standard value: 0.02 - 0.05 mm (.OOOS - .0020 in.) Limit: 0.1 mm (.004 in.) 1 EN0271

INSTALLATION SERVICE POINTS +A4 PISTON PIN INSTALLATION

F

Press Pin

Base

t

A

*

+ /

Piston SUPPOrt

(1) Thread the stop screw and lock nut assembly into the base. Fit the correct piston support on the top of the base. Inset-t the press pin, threaded end up, into the hole in the piston support until the press pin touches the stop screw. (2) Using the graduations on the press pin, adjust the stop screw to the depth. Depth: MONTERO and TRUCK 60 mm 62 mm DIAMANTE, 3000GT

scrkw Pin depth set

7EN042C 3

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1

6G7 ENGINE - Piston and Connectinn Rod (3) Place the base on the press support blocks. (4) Slide the piston pin over the threaded end of the press pin, and thread the correct guide pin up against it. (5) Coat the piston pin with oil, and with the connecting rod held in position, slide the guide pin through the piston and connecting rod. (6) Press the piston pin through the. connecting rod until the guide pin contacts the stop screw. (7) Remove the piston assembly from the base. Remove the guide pin and press pin from the assembly. IMPORTANT: Due to production tolerance variations, it is necessary to visually inspect the piston pin depth after installation to verify that the piston pin is centered. Adjust if necessary.

7EN042E

#B4 OIL RING INSTALLATION (1) Fit the oil ring spacer into the piston ring groove. NOTE The side rails and spacer may be installed in either direction.

6EN058

1 EN026E

(2) Install the upper side rail To install the side rail, first fit one end of the rail into the piston groove, then press the remaining portion into the position by finger. See illustration. Use of a ring expander to expand the side rail end gap can break the side rail, unlike other piston rings. NOTE Do not use any piston ring expander when installing the side rail. (3) Install the lower side rail in the same procedure as described in step (2). (4) Make sure that the side rails move smoothly in either direction.

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6G7 ENGINE - Piston and Connecting Rod

llE=IA3

bc4

PISTON RING NO.2 / PISTON RING NO.1 INSTALLATION (1) Using a piston ring expander, fit No.2 and then No.1 piston ring into position. NOTE 1. Note the difference in shape between No.1 and No.2 piston rings. 2. Install piston rings No.1 and No.2 with their side having marks facing up (on the piston crown side.)

\ 7ENO452

7EN0369

Upper side rail

and spacer gap

+D4 PISTON AND CONNECTING ROD INSTALLATION No.1

(1) Liberally coat the circumference of the piston, piston ring, and oil ring with engine oil. (2) Arrange the piston ring and oil ring gaps (side rail and spacer) as shown in the illustration. (3) Rotate the crankshaft so that the crank pin is on the center of the cylinder bore.

6EN0541

(4) Use suitable thread protectors on the connecting rod bolts before inserting the piston and connecting rod assembly into the cylinder block. Care must be taken not to nick the crank pin. (5) Using a suitable piston ring compressor tool, install the piston and connecting rod assembly into the cylinder block. Caution Install the piston with the front mark (arrow mark) on the top of the piston directed towards the engine front (timing belt side). MONTERO and TRUCK

NOTE For MONTERO and TRUCK, two types of pistons, one for cylinders 1, 3 and 5 and the other for cylinders 2, 4 and 6, have been used. Piston with R: For cylinders 1, 3 and 5 Piston with L: For cylinders 2, 4 and 6

IIE-114

6G7 ENGINE - Piston and Connectinn Rod

I)E4

Cylinder No.

/

CONNECTING ROD CAP INSTALLATION (1) Mate the correct bearing cap with the correct connecting rod by checking with the alignment marks marked during disassembly. If a new connecting rod is used which has no alignment mark, position the notches for locking the bearing on the same side.

Notches 7EN045: 3

(2) Check if the thrust clearance in the connecting rod big end is correct. Standard value: 0.10 - 0.25 mm (.0039 - .0098 in.) Limit: 0.4 mm (.0157 in.)

7EN0454

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1 l’E415

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate

CRANKSHAFT, FLYWHEEL AND DRIVE PLATE REMOVAL AND INSTALLATION 23 Nm 17 ftlbs.

1

I 74

7k Nm 54 ft.lbs.

26

75 Nm 54 ft.lbs.

6

14SOHC 79 Nm 57 ft.lbs. DOHC 93 Nm 67 ftlbs.

48Nm 35 ft.lbs.

16

Removal steps 1. Flywheel For MIT 2. Ball bearing > 3. Adaptor plate 4. Drive elate 1 For 4WD A/T 5. Crankshaft adaptor 1 6. Adaptor plate 7. Drive plate For FWD A/T 8. Rear plate 9. Bell housing cover eF4 IO. Oil seal case TSB Revision

eE4 eD4 eC4 eC4 +C4 +C4 *I34 +B4 eB4 #B4 #B4 eB4 +A4

11. Crankshaft rear oil seal 12. Bearing cap stay __ 1992 models-Turbo 13. Bearing cap bolt 14. Bearing cap 15. Bearing cap bolt I 1993 models-Turbo 16. Bearing cap 17. Thrust beanng A 18. Thrust bearing B 19. Crankshaft bearing (lower) 20. Crankshaft 21. Thrust bearing B 22. Thrust bearing A 23. Crankshaft bearing (upper) 24. Knock sensor 25. Knock sensor bracket 26. Cylinder block

7EN0514

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate INSPECTION CRANKSHAFT If the oil clearance exceeds the limit, replace the bearing, and crankshaft if necessary. (1) Measure the outside diameter of the journals and the inside diameter of the crankshaft bearings. If the difference between them (oil clearance) exceeds the limit, replace the crankshaft bearing and, if necessary, crankshaft. Standard value: 0.02 - 0.05 mm (.0008 - .0020 in.) Limit: 0.1 mm (.004 in.) Caution Do not attempt an undersize machining of the crankshaft with special surface treatment. This crankshaft can be identified by its dull gray appearance.

CRANKSHAFT JOURNAL OIL CLEARANCE (PLASTIC GAUGE METHOD) The crankshaft oil clearance can be measured easily by using a plastic gauge, as follows: (1) Remove oil and grease and any other foreign matters from the crankshaft journal and bearing inner surface. (2) Install the crankshaft. (3) Cut the plastic gauge to the same length as the width of the bearing and place it on the journal in parallel with its axis.

(4) Gently place the crankshaft bearing cap over it and tighten the bolts to the specified torque. (5) Remove the bolts and gently remove the crankshaft bearing cap. (6) Measure the width of the smashed plastic gauge at its widest section by using a scale printed on the plastic gauge bag.

7ENOl41

CRANKSHAFT REAR OIL SEAL (1) Check the oil seal lip for wear and damage. (2) Check rubber for deterioration or hardening. (3) Check the oil seal case for cracks and damage.

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I

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate

ll&-1-17

INSPECTION CYLINDER BLOCK (I\ VisuaUy check for scratches, rust, and corrosion. Use also a flaw detecting agent for the check. If defects are evident, correct, or replace. (2) Using a straightedge and feeler gauge, check the block top surface for warpage. Make sure that the surface is free from gasket chips and other foreign matter. Standard value: 0.05 mm (.0020 in.) Limit: 0.1 mm (.0039 in.) (3) If the distortion is excessive, correct within the allowable limit or replace. Grinding limit: 0.2 mm (.008 in.) The total thickness of the stock allowed to be removed from cylinder block and mating cylinder head is 0.2 mm (008 in.) at maximum. Cylinder block height (when new): 210.5 mm (8.29 in.)

(4) Check the cylinder walls for scratches and seizure. If defects are evident, correct (rebore to an oversize) or replace. (5) Using a cylinder gauge, measure the cylinder bore and cylindricity. If worn badly, correct by boring the cylinders to an oversize and replace pistons and piston rings. Measure at the points shown in the illustration. Standard value: Cylinder I.D.: 91.10 - 91.13 mm (3.5866 - 3.5878 in.) Cylindricity: 0.01 (.0004 in.) BORING CYLINDER (1) Oversize pistons to be used should be determined on the basis of the largest bore cylinder. Piston size identification -

m

-Thrust direction

7EN0462

NOTE Size mark is stamped on the piston top. (2) Measure the outside diameter of the piston to be used. Measure it in the thrust direction as shown. (3) Based on the measured piston O.D., calculate the boring finish dimension. Boring finish dimension = Piston O.D. + (clearance between piston O.D. and cylinder) - 0.02 mm (.OOOS in.) (honing margin)

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IIE-118

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate (4) Bore all cylinders to the calculated boring finish dimension. Caution To prevent distortion that may result from temperature rise during honing, bore cylinders in the order of No.2, No.4, No.6, No.1, No.3 a n d No.5. (5) Hone to the final finish dimension (piston O.D. + clearance between piston 0-D. and cylinder). (6) Check the clearance between the piston and cylinder. Clearance between piston and cylinder: 0.01 - 0.04 m m (-0004 - .0016 in.) NOTE When boring cylinders, finish all of six cylinders to the same oversize. Do not bore only one cylinder to an oversize.

INSTALLATION SERVICE POINTS I)A4 DETONATION SENSOR BRACKET INSTALLATION (1) Check that the bracket is in intimate contact with the cylinder block boss and tighten to specified torque in the order shown.

1 TSB Revision

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate

IfE-m

I)B4 CRANKSHAFT BEARING (UPPER) / THRUST BEARING A / THRUST BEARING B / CRANKSHAFT BEARING (LOWER) INSTALLATION (1) Classify the crankshaft bearings (upper and lower) by whether there is an oil groove or not. Then, assemble as shown in the illustration. (2) Assemble the thrust bearings (A and B) on the No.3 journal area as shown. Caution Install them with the groove side facing outward.

Oil groove

Crankshaft bearing (upper)

No oil groove

Timing belt side

Timing belt side

7EN0463

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IIE-120

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate BEARING CAP / BEARING BOLT INSTALLATION I)c4 (1) Attach the bearing cap on the cylinder block as shown in the illustration. (2) Tighten the bearing cap bolts to the specified torque in the sequence shown in the illustration. (3) Check that the crankshaft rotates smoothly.

Cylinder

(4) Check the end plate. If it exceeds the limit value, replace the thrust bearing. Standard value : 0.05 - 0.25 mm (.0020 - .0098 in.) Limit: 0.3 mm (.012 in.)

I)Dg BEARING CAP STAY INSTALLATION - DOHC TURBO (1) Apply engine oil to the thread and bearing surface of each bolt. (2) Temporarily tighten the bolts on the cylinder block side. (3) Tighten the bolts on the bearing cap side to the specified (4) Frr%;: tighten the bolts on the cylinder block side to the specified torque. NOTE The bearing cap stays A and B differ in shape. Install correct ones on correct sides. 1 TSB Revision

6G7 ENGINE - Crankshaft, Flywheel and Drive Plate

IIE-121

I)E4

CRANKSHAFT REAR OIL SEAL INSTALLATION (1) Using the special tool, press-fit a new crankshaft rear oil seal into the oil seal case.

7EN046! i -I

M 8990938-01

I I

MD99871 8-01

7EN0466

Sealing agent

I)F4

OIL SEAL CASE INSTALLATION (1) Apply specified sealant to the area shown in the illustration. Specified sealant: MITSUBISHI GENUINE Part No. MD970389 or equivalent (2) Apply a small amount of engine oil to the entire circuinference of the oil seal lip section, and place the oil seal on the cylinder block.

7EN0467

1 TSB Revision

I

II

llE-122

6G7 ENGINE - Bracket

BRACKET REMOVAL AND INSTALLATION - DIAMANTE and 3000GT

2

42Nm 30 ft.lbs. I

Removal steps 1. Engine support bracket, right 2. Engine support bracket, left 7EN0521

REMOVAL AND INSTALLATION - MONTERO and TRUCK

30 ft.lbs.

25 Nm 18 ft.lbs.

Removal steps 1. Roll stopper bracket, front 2. Roll stopper bracket, rear 1 TSB Revision